A234845 Number of commutative inverse monoids of order n.

1, 2, 4, 11, 27, 87, 300, 1259, 5988, 32812, 202784, 1400541, 10669344, 88761928, 799112310

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), A234844 (inverse monoids).