A234844 Number of inverse monoids of order n.

1, 2, 4, 11, 27, 89, 310, 1311, 6253, 34325, 212247, 1466180, 11167987, 92889294, 836021796

Offset: 1

Author

Joerg Arndt, Dec 31 2013

Keywords

• nonn
• hard
• more

Links

• Martin E. Malandro, Enumeration of finite inverse semigroups, arXiv:1312.7192 [math.CO]

Crossrefs

Cf. A001428 (inverse semigroups), A234843 (commutative inverse semigroups), A234845 (commutative inverse monoids).