| Σ | # | Presentation | Description | Related |
| 5 | 52 | ⟨a, b | aba=ab⟩ | Infinite non-commutative monoid | |
| 6 | 102 | ⟨a, b | aaba=ab⟩ | Infinite non-commutative monoid | |
| 6 | 103 | ⟨a, b | aaba=ba⟩ | Infinite non-commutative monoid | |
| 6 | 110 | ⟨a, b | abab=ba⟩ | Infinite non-commutative monoid | |
| 6 | 123 | ⟨a, b | bab=aba⟩ | Infinite non-commutative monoid | |
| 7 | 205 | ⟨a, b | aaaba=ab⟩ | Infinite non-commutative monoid | |
| 7 | 206 | ⟨a, b | aaaba=ba⟩ | Infinite non-commutative monoid | |
| 7 | 213 | ⟨a, b | aabaa=ab⟩ | Infinite non-commutative monoid | |
| 7 | 228 | ⟨a, b | ababa=ab⟩ | Infinite non-commutative monoid | |
| 7 | 248 | ⟨a, b | aaba=aab⟩ | Infinite non-commutative monoid | |
| 7 | 260 | ⟨a, b | abab=aab⟩ | Infinite non-commutative monoid | |
| 7 | 261 | ⟨a, b | abab=aba⟩ | Infinite non-commutative monoid | |
| 7 | 266 | ⟨a, b | abba=abb⟩ | Infinite non-commutative monoid | |
| 8 | 421 | ⟨a, b | aaaaba=ab⟩ | Infinite non-commutative monoid | |
| 8 | 422 | ⟨a, b | aaaaba=ba⟩ | Infinite non-commutative monoid | |
| 8 | 429 | ⟨a, b | aaabaa=ab⟩ | Infinite non-commutative monoid | |
| 8 | 430 | ⟨a, b | aaabaa=ba⟩ | Infinite non-commutative monoid | |
| 8 | 437 | ⟨a, b | aaabba=ab⟩ | Infinite non-commutative monoid | |
| 8 | 445 | ⟨a, b | aabaab=ba⟩ | Infinite non-commutative monoid | |
| 8 | 448 | ⟨a, b | aababa=ab⟩ | Infinite non-commutative monoid | |
| 8 | 449 | ⟨a, b | aababa=ba⟩ | Infinite non-commutative monoid | |
| 8 | 455 | ⟨a, b | aabbaa=ab⟩ | Infinite non-commutative monoid | |
| 8 | 470 | ⟨a, b | abaaba=ab⟩ | Infinite non-commutative monoid | |
| 8 | 474 | ⟨a, b | ababab=ba⟩ | Infinite non-commutative monoid | |
| 8 | 500 | ⟨a, b | aaaba=aab⟩ | Infinite non-commutative monoid | |
| 8 | 516 | ⟨a, b | aabaa=aab⟩ | Infinite non-commutative monoid | |
| 8 | 530 | ⟨a, b | aabba=aab⟩ | Infinite non-commutative monoid | |
| 8 | 532 | ⟨a, b | aabba=abb⟩ | Infinite non-commutative monoid | |
| 8 | 535 | ⟨a, b | aabba=bba⟩ | Infinite non-commutative monoid | |
| 8 | 538 | ⟨a, b | abaab=aab⟩ | Infinite non-commutative monoid | |
| 8 | 539 | ⟨a, b | abaab=aba⟩ | Infinite non-commutative monoid | |
| 8 | 540 | ⟨a, b | abaab=abb⟩ | Infinite non-commutative monoid | |
| 8 | 541 | ⟨a, b | abaab=baa⟩ | Infinite non-commutative monoid | |
| 8 | 542 | ⟨a, b | abaab=bab⟩ | Infinite non-commutative monoid | |
| 8 | 548 | ⟨a, b | ababa=abb⟩ | Infinite non-commutative monoid | |
| 8 | 549 | ⟨a, b | ababa=bab⟩ | Infinite non-commutative monoid | |
| 8 | 554 | ⟨a, b | abbba=abb⟩ | Infinite non-commutative monoid | |
| 8 | 570 | ⟨a, b | abab=abaa⟩ | Infinite non-commutative monoid | |
| 8 | 586 | ⟨a, b | baab=aaba⟩ | Infinite non-commutative monoid | |
| 8 | 587 | ⟨a, b | baab=abba⟩ | Infinite non-commutative monoid | |
| 8 | 589 | ⟨a, b | baba=abab⟩ | Infinite non-commutative monoid | |
| 9 | 875 | ⟨a, b | aaaaaba=ab⟩ | Infinite non-commutative monoid | |
| 9 | 876 | ⟨a, b | aaaaaba=ba⟩ | Infinite non-commutative monoid | |
| 9 | 883 | ⟨a, b | aaaabaa=ab⟩ | Infinite non-commutative monoid | |
| 9 | 884 | ⟨a, b | aaaabaa=ba⟩ | Infinite non-commutative monoid | |
| 9 | 899 | ⟨a, b | aaabaaa=ab⟩ | Infinite non-commutative monoid | |
| 9 | 906 | ⟨a, b | aaababa=ab⟩ | Infinite non-commutative monoid | |
| 9 | 907 | ⟨a, b | aaababa=ba⟩ | Infinite non-commutative monoid | |
| 9 | 930 | ⟨a, b | aabaaba=ab⟩ | Infinite non-commutative monoid | |
| 9 | 931 | ⟨a, b | aabaaba=ba⟩ | Infinite non-commutative monoid | |
| 9 | 938 | ⟨a, b | aababaa=ab⟩ | Infinite non-commutative monoid | |
| 9 | 972 | ⟨a, b | abaaaba=ab⟩ | Infinite non-commutative monoid | |
| 9 | 976 | ⟨a, b | abaabab=ba⟩ | Infinite non-commutative monoid | |
| 9 | 987 | ⟨a, b | abababa=ab⟩ | Infinite non-commutative monoid | |
| 9 | 1018 | ⟨a, b | aaaaba=aab⟩ | Infinite non-commutative monoid | |
| 9 | 1034 | ⟨a, b | aaabaa=aab⟩ | Infinite non-commutative monoid | |
| 9 | 1037 | ⟨a, b | aaabaa=baa⟩ | Infinite non-commutative monoid | |
| 9 | 1050 | ⟨a, b | aaabba=aab⟩ | Infinite non-commutative monoid | |
| 9 | 1052 | ⟨a, b | aaabba=abb⟩ | Infinite non-commutative monoid | |
| 9 | 1055 | ⟨a, b | aaabba=bba⟩ | Infinite non-commutative monoid | |
| 9 | 1063 | ⟨a, b | aabaab=aba⟩ | Infinite non-commutative monoid | |
| 9 | 1065 | ⟨a, b | aabaab=baa⟩ | Infinite non-commutative monoid | |
| 9 | 1072 | ⟨a, b | aababa=abb⟩ | Infinite non-commutative monoid | |
| 9 | 1075 | ⟨a, b | aababa=bba⟩ | Infinite non-commutative monoid | |
| 9 | 1084 | ⟨a, b | aabbaa=abb⟩ | Infinite non-commutative monoid | |
| 9 | 1096 | ⟨a, b | aabbba=aab⟩ | Infinite non-commutative monoid | |
| 9 | 1098 | ⟨a, b | aabbba=abb⟩ | Infinite non-commutative monoid | |
| 9 | 1101 | ⟨a, b | aabbba=bba⟩ | Infinite non-commutative monoid | |
| 9 | 1106 | ⟨a, b | abaaab=abb⟩ | Infinite non-commutative monoid | |
| 9 | 1107 | ⟨a, b | abaaab=baa⟩ | Infinite non-commutative monoid | |
| 9 | 1108 | ⟨a, b | abaaab=bab⟩ | Infinite non-commutative monoid | |
| 9 | 1114 | ⟨a, b | abaaba=abb⟩ | Infinite non-commutative monoid | |
| 9 | 1118 | ⟨a, b | ababab=aab⟩ | Infinite non-commutative monoid | |
| 9 | 1119 | ⟨a, b | ababab=aba⟩ | Infinite non-commutative monoid | |
| 9 | 1124 | ⟨a, b | ababba=abb⟩ | Infinite non-commutative monoid | |
| 9 | 1125 | ⟨a, b | ababba=baa⟩ | Infinite non-commutative monoid | |
| 9 | 1127 | ⟨a, b | ababba=bba⟩ | Infinite non-commutative monoid | |
| 9 | 1130 | ⟨a, b | abbaab=aab⟩ | Infinite non-commutative monoid | |
| 9 | 1132 | ⟨a, b | abbaab=baa⟩ | Infinite non-commutative monoid | |
| 9 | 1166 | ⟨a, b | aaaba=aaab⟩ | Infinite non-commutative monoid | |
| 9 | 1175 | ⟨a, b | aaaba=baba⟩ | Infinite non-commutative monoid | |
| 9 | 1199 | ⟨a, b | aabaa=aaba⟩ | Infinite non-commutative monoid | |
| 9 | 1226 | ⟨a, b | aabba=aabb⟩ | Infinite non-commutative monoid | |
| 9 | 1232 | ⟨a, b | aabba=baab⟩ | Infinite non-commutative monoid | |
| 9 | 1233 | ⟨a, b | aabba=baba⟩ | Infinite non-commutative monoid | |
| 9 | 1240 | ⟨a, b | abaab=aaab⟩ | Infinite non-commutative monoid | |
| 9 | 1243 | ⟨a, b | abaab=abaa⟩ | Infinite non-commutative monoid | |
| 9 | 1248 | ⟨a, b | abaab=baab⟩ | Infinite non-commutative monoid | |
| 9 | 1257 | ⟨a, b | ababa=aaba⟩ | Infinite non-commutative monoid | |
| 9 | 1259 | ⟨a, b | ababa=abab⟩ | Infinite non-commutative monoid | |
| 9 | 1269 | ⟨a, b | abbba=abab⟩ | Infinite non-commutative monoid | |
| 9 | 1271 | ⟨a, b | abbba=abbb⟩ | Infinite non-commutative monoid | |
| 9 | 1272 | ⟨a, b | abbba=baab⟩ | Infinite non-commutative monoid | |
| 9 | 1273 | ⟨a, b | abbba=babb⟩ | Infinite non-commutative monoid | |
| 10 | 1827 | ⟨a, b | aaaaaaba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1828 | ⟨a, b | aaaaaaba=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1835 | ⟨a, b | aaaaabaa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1836 | ⟨a, b | aaaaabaa=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1851 | ⟨a, b | aaaabaaa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1852 | ⟨a, b | aaaabaaa=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1859 | ⟨a, b | aaaababa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1860 | ⟨a, b | aaaababa=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1883 | ⟨a, b | aaabaaab=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1886 | ⟨a, b | aaabaaba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1887 | ⟨a, b | aaabaaba=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1894 | ⟨a, b | aaababaa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1895 | ⟨a, b | aaababaa=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1902 | ⟨a, b | aaababba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1916 | ⟨a, b | aaabbaba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1941 | ⟨a, b | aabaaaba=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1948 | ⟨a, b | aabaabaa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1960 | ⟨a, b | aababaab=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1963 | ⟨a, b | aabababa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1964 | ⟨a, b | aabababa=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1970 | ⟨a, b | aababbaa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1971 | ⟨a, b | aababbaa=ba⟩ | Infinite non-commutative monoid | |
| 10 | 2024 | ⟨a, b | abaaaaba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 2028 | ⟨a, b | abaaabab=ba⟩ | Infinite non-commutative monoid | |
| 10 | 2039 | ⟨a, b | abaababa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 2040 | ⟨a, b | abaababa=ba⟩ | Infinite non-commutative monoid | |
| 10 | 2055 | ⟨a, b | abababab=ba⟩ | Infinite non-commutative monoid | |
| 10 | 2106 | ⟨a, b | aaaaaba=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2122 | ⟨a, b | aaaabaa=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2125 | ⟨a, b | aaaabaa=baa⟩ | Infinite non-commutative monoid | |
| 10 | 2138 | ⟨a, b | aaaabba=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2140 | ⟨a, b | aaaabba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2143 | ⟨a, b | aaaabba=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2154 | ⟨a, b | aaabaaa=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2170 | ⟨a, b | aaababa=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2173 | ⟨a, b | aaababa=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2186 | ⟨a, b | aaabbaa=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2189 | ⟨a, b | aaabbaa=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2200 | ⟨a, b | aaabbba=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2202 | ⟨a, b | aaabbba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2205 | ⟨a, b | aaabbba=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2211 | ⟨a, b | aabaaab=baa⟩ | Infinite non-commutative monoid | |
| 10 | 2216 | ⟨a, b | aabaaba=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2218 | ⟨a, b | aabaaba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2219 | ⟨a, b | aabaaba=baa⟩ | Infinite non-commutative monoid | |
| 10 | 2221 | ⟨a, b | aabaaba=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2234 | ⟨a, b | aababaa=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2248 | ⟨a, b | aababba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2251 | ⟨a, b | aababba=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2259 | ⟨a, b | aabbaab=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2264 | ⟨a, b | aabbaba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2267 | ⟨a, b | aabbaba=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2272 | ⟨a, b | aabbbaa=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2284 | ⟨a, b | aabbbba=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2294 | ⟨a, b | abaaaab=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2296 | ⟨a, b | abaaaab=bab⟩ | Infinite non-commutative monoid | |
| 10 | 2302 | ⟨a, b | abaaaba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2303 | ⟨a, b | abaaaba=bab⟩ | Infinite non-commutative monoid | |
| 10 | 2306 | ⟨a, b | abaabab=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2308 | ⟨a, b | abaabab=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2309 | ⟨a, b | abaabab=baa⟩ | Infinite non-commutative monoid | |
| 10 | 2310 | ⟨a, b | abaabab=bab⟩ | Infinite non-commutative monoid | |
| 10 | 2314 | ⟨a, b | abaabba=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2316 | ⟨a, b | abaabba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2319 | ⟨a, b | abaabba=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2323 | ⟨a, b | ababaab=aba⟩ | Infinite non-commutative monoid | |
| 10 | 2324 | ⟨a, b | ababaab=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2325 | ⟨a, b | ababaab=baa⟩ | Infinite non-commutative monoid | |
| 10 | 2332 | ⟨a, b | abababa=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2336 | ⟨a, b | ababbba=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2338 | ⟨a, b | ababbba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2339 | ⟨a, b | ababbba=baa⟩ | Infinite non-commutative monoid | |
| 10 | 2346 | ⟨a, b | abbaaab=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2347 | ⟨a, b | abbaaab=baa⟩ | Infinite non-commutative monoid | |
| 10 | 2349 | ⟨a, b | abbaaab=bba⟩ | Infinite non-commutative monoid | |
| 10 | 2352 | ⟨a, b | abbabba=aab⟩ | Infinite non-commutative monoid | |
| 10 | 2354 | ⟨a, b | abbabba=abb⟩ | Infinite non-commutative monoid | |
| 10 | 2355 | ⟨a, b | abbabba=bab⟩ | Infinite non-commutative monoid | |
| 10 | 2390 | ⟨a, b | aaaaba=aaab⟩ | Infinite non-commutative monoid | |
| 10 | 2399 | ⟨a, b | aaaaba=baba⟩ | Infinite non-commutative monoid | |
| 10 | 2422 | ⟨a, b | aaabaa=aaab⟩ | Infinite non-commutative monoid | |
| 10 | 2423 | ⟨a, b | aaabaa=aaba⟩ | Infinite non-commutative monoid | |
| 10 | 2425 | ⟨a, b | aaabaa=abaa⟩ | Infinite non-commutative monoid | |
| 10 | 2454 | ⟨a, b | aaabba=aaab⟩ | Infinite non-commutative monoid | |
| 10 | 2456 | ⟨a, b | aaabba=aabb⟩ | Infinite non-commutative monoid | |
| 10 | 2458 | ⟨a, b | aaabba=abab⟩ | Infinite non-commutative monoid | |
| 10 | 2463 | ⟨a, b | aaabba=baba⟩ | Infinite non-commutative monoid | |
| 10 | 2480 | ⟨a, b | aabaab=aaab⟩ | Infinite non-commutative monoid | |
| 10 | 2481 | ⟨a, b | aabaab=aaba⟩ | Infinite non-commutative monoid | |
| 10 | 2482 | ⟨a, b | aabaab=aabb⟩ | Infinite non-commutative monoid | |
| 10 | 2485 | ⟨a, b | aabaab=abba⟩ | Infinite non-commutative monoid | |
| 10 | 2488 | ⟨a, b | aabaab=baab⟩ | Infinite non-commutative monoid | |
| 10 | 2489 | ⟨a, b | aabaab=baba⟩ | Infinite non-commutative monoid | |
| 10 | 2498 | ⟨a, b | aababa=aabb⟩ | Infinite non-commutative monoid | |
| 10 | 2500 | ⟨a, b | aababa=abab⟩ | Infinite non-commutative monoid | |
| 10 | 2504 | ⟨a, b | aababa=baab⟩ | Infinite non-commutative monoid | |
| 10 | 2505 | ⟨a, b | aababa=baba⟩ | Infinite non-commutative monoid | |
| 10 | 2522 | ⟨a, b | aabbaa=aaab⟩ | Infinite non-commutative monoid | |
| 10 | 2523 | ⟨a, b | aabbaa=aaba⟩ | Infinite non-commutative monoid | |
| 10 | 2524 | ⟨a, b | aabbaa=aabb⟩ | Infinite non-commutative monoid | |
| 10 | 2525 | ⟨a, b | aabbaa=abab⟩ | Infinite non-commutative monoid | |
| 10 | 2550 | ⟨a, b | aabbba=aabb⟩ | Infinite non-commutative monoid | |
| 10 | 2552 | ⟨a, b | aabbba=abab⟩ | Infinite non-commutative monoid | |
| 10 | 2554 | ⟨a, b | aabbba=abbb⟩ | Infinite non-commutative monoid | |
| 10 | 2561 | ⟨a, b | aabbba=bbba⟩ | Infinite non-commutative monoid | |
| 10 | 2564 | ⟨a, b | abaaab=aaab⟩ | Infinite non-commutative monoid | |
| 10 | 2567 | ⟨a, b | abaaab=abaa⟩ | Infinite non-commutative monoid | |
| 10 | 2569 | ⟨a, b | abaaab=abba⟩ | Infinite non-commutative monoid | |
| 10 | 2571 | ⟨a, b | abaaab=baaa⟩ | Infinite non-commutative monoid | |
| 10 | 2573 | ⟨a, b | abaaab=baba⟩ | Infinite non-commutative monoid | |
| 10 | 2581 | ⟨a, b | abaaba=aaba⟩ | Infinite non-commutative monoid | |
| 10 | 2583 | ⟨a, b | abaaba=abab⟩ | Infinite non-commutative monoid | |
| 10 | 2586 | ⟨a, b | abaaba=baab⟩ | Infinite non-commutative monoid | |
| 10 | 2590 | ⟨a, b | ababab=aaab⟩ | Infinite non-commutative monoid | |
| 10 | 2593 | ⟨a, b | ababab=abaa⟩ | Infinite non-commutative monoid | |
| 10 | 2602 | ⟨a, b | ababba=aabb⟩ | Infinite non-commutative monoid | |
| 10 | 2606 | ⟨a, b | ababba=abbb⟩ | Infinite non-commutative monoid | |
| 10 | 2611 | ⟨a, b | ababba=bbaa⟩ | Infinite non-commutative monoid | |
| 10 | 2612 | ⟨a, b | ababba=bbab⟩ | Infinite non-commutative monoid | |
| 10 | 2613 | ⟨a, b | ababba=bbba⟩ | Infinite non-commutative monoid | |
| 10 | 2616 | ⟨a, b | abbaab=aaab⟩ | Infinite non-commutative monoid | |
| 10 | 2619 | ⟨a, b | abbaab=abaa⟩ | Infinite non-commutative monoid | |
| 10 | 2621 | ⟨a, b | abbaab=abba⟩ | Infinite non-commutative monoid | |
| 10 | 2629 | ⟨a, b | abbbba=abab⟩ | Infinite non-commutative monoid | |
| 10 | 2631 | ⟨a, b | abbbba=abbb⟩ | Infinite non-commutative monoid | |
| 10 | 2632 | ⟨a, b | abbbba=baab⟩ | Infinite non-commutative monoid | |
| 10 | 2673 | ⟨a, b | abaab=aabaa⟩ | Infinite non-commutative monoid | |
| 10 | 2677 | ⟨a, b | abaab=abaaa⟩ | Infinite non-commutative monoid | |
| 10 | 2686 | ⟨a, b | ababa=abaab⟩ | Infinite non-commutative monoid | |
| 10 | 2708 | ⟨a, b | abbab=abaaa⟩ | Infinite non-commutative monoid | |
| 10 | 2711 | ⟨a, b | abbab=abbaa⟩ | Infinite non-commutative monoid | |
| 10 | 2720 | ⟨a, b | abbba=abaab⟩ | Infinite non-commutative monoid | |
| 10 | 2743 | ⟨a, b | baaab=aabaa⟩ | Infinite non-commutative monoid | |
| 10 | 2744 | ⟨a, b | baaab=aabba⟩ | Infinite non-commutative monoid | |
| 10 | 2745 | ⟨a, b | baaab=ababa⟩ | Infinite non-commutative monoid | |
| 10 | 2746 | ⟨a, b | baaab=abbba⟩ | Infinite non-commutative monoid | |
| 10 | 2752 | ⟨a, b | baaba=abbab⟩ | Infinite non-commutative monoid | |
| 10 | 2759 | ⟨a, b | baabb=abbaa⟩ | Infinite non-commutative monoid | |
| 10 | 2767 | ⟨a, b | babab=ababa⟩ | Infinite non-commutative monoid | |
| Σ | # | Presentation | Description | Related |
| 6 | 112 | ⟨a, b | abba=ab⟩ | Infinite non-commutative monoid | |
| 7 | 220 | ⟨a, b | aabba=ab⟩ | Infinite non-commutative monoid | |
| 7 | 221 | ⟨a, b | aabba=ba⟩ | Infinite non-commutative monoid | |
| 7 | 225 | ⟨a, b | abaab=ba⟩ | Infinite non-commutative monoid | |
| 8 | 438 | ⟨a, b | aaabba=ba⟩ | Infinite non-commutative monoid | |
| 8 | 476 | ⟨a, b | ababba=ab⟩ | Infinite non-commutative monoid | |
| 9 | 768 | ⟨a, b | aaababaa=a⟩ | Infinite non-commutative monoid | |
| 9 | 860 | ⟨a, b | abbaabba=b⟩ | Infinite non-commutative monoid | 1 iso |
| 9 | 891 | ⟨a, b | aaaabba=ab⟩ | Infinite non-commutative monoid | |
| 9 | 914 | ⟨a, b | aaabbaa=ab⟩ | Infinite non-commutative monoid | |
| 9 | 915 | ⟨a, b | aaabbaa=ba⟩ | Infinite non-commutative monoid | |
| 9 | 927 | ⟨a, b | aabaaab=ba⟩ | Infinite non-commutative monoid | |
| 9 | 945 | ⟨a, b | aababba=ab⟩ | Infinite non-commutative monoid | |
| 9 | 953 | ⟨a, b | aabbaba=ab⟩ | Infinite non-commutative monoid | |
| 9 | 954 | ⟨a, b | aabbaba=ba⟩ | Infinite non-commutative monoid | |
| 9 | 957 | ⟨a, b | aabbbaa=ab⟩ | Infinite non-commutative monoid | |
| 9 | 979 | ⟨a, b | abaabba=ab⟩ | Infinite non-commutative monoid | |
| 9 | 998 | ⟨a, b | abbabba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1623 | ⟨a, b | aaababaaa=a⟩ | Infinite non-commutative monoid | 1 iso |
| 10 | 1803 | ⟨a, b | abbaabaab=a⟩ | Infinite non-commutative monoid | |
| 10 | 1843 | ⟨a, b | aaaaabba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1867 | ⟨a, b | aaaabbaa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1875 | ⟨a, b | aaaabbba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1909 | ⟨a, b | aaabbaaa=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1917 | ⟨a, b | aaabbaba=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1925 | ⟨a, b | aaabbbaa=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1940 | ⟨a, b | aabaaaba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1955 | ⟨a, b | aabaabba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1978 | ⟨a, b | aababbba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1986 | ⟨a, b | aabbaaba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1987 | ⟨a, b | aabbaaba=ba⟩ | Infinite non-commutative monoid | |
| 10 | 1997 | ⟨a, b | aabbabba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 1998 | ⟨a, b | aabbabba=ba⟩ | Infinite non-commutative monoid | |
| 10 | 2006 | ⟨a, b | aabbbaba=ba⟩ | Infinite non-commutative monoid | |
| 10 | 2031 | ⟨a, b | abaaabba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 2036 | ⟨a, b | abaabaab=ba⟩ | Infinite non-commutative monoid | |
| 10 | 2044 | ⟨a, b | abaabbab=ba⟩ | Infinite non-commutative monoid | |
| 10 | 2065 | ⟨a, b | ababbaba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 2076 | ⟨a, b | abbaabba=ab⟩ | Infinite non-commutative monoid | |
| 10 | 2077 | ⟨a, b | abbaabba=bb⟩ | Infinite non-commutative monoid | |
| 10 | 2078 | ⟨a, b | abbabaab=aa⟩ | Infinite non-commutative monoid | |
| 10 | 2483 | ⟨a, b | aabaab=abaa⟩ | Infinite non-commutative monoid | |
| 10 | 2487 | ⟨a, b | aabaab=baaa⟩ | Infinite non-commutative monoid | |
| 10 | 2572 | ⟨a, b | abaaab=baab⟩ | Infinite non-commutative monoid | |
| 10 | 2608 | ⟨a, b | ababba=baab⟩ | Infinite non-commutative monoid | |
| 10 | 2750 | ⟨a, b | baaba=abaab⟩ | Infinite non-commutative monoid | |
| 10 | 2756 | ⟨a, b | baabb=aabba⟩ | Infinite non-commutative monoid | |