Number of inverse semigroups of order <= n.

Terms

a(0) =1a(1) =3a(2) =8a(3) =24a(4) =76a(5) =284a(6) =1195a(7) =5832a(8) =32254a(9) =201417a(10) =1400068a(11) =10724115a(12) =89584802a(13) =809190807a(14) =7844705449