Number of nonisomorphic monoids (semigroups with identity) of order n.

A058129

Number of nonisomorphic monoids (semigroups with identity) of order n.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =7a(4) =35a(5) =228a(6) =2237a(7) =31559a(8) =1668997a(9) =3685886630

External references