Number of k-ary quasitrivial semigroups that have no neutral element on an n-element set.
A308352
Number of k-ary quasitrivial semigroups that have no neutral element on an n-element set.
Terms
- a(0) =0a(1) =2a(2) =8a(3) =58a(4) =492a(5) =5074a(6) =60888a(7) =835482a(8) =12895796a(9) =221169970a(10) =4172486496a(11) =85872215290
External references
- oeis: A308352