Number of self-converse semigroups of order n.

A029851

Number of self-converse semigroups of order n.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =12a(4) =64a(5) =405a(6) =3312a(7) =44370a(8) =2209839a(9) =623492664

External references