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Number of inverse monoids of order n.
3

%I #7 Dec 31 2013 12:35:59

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

%T 836021796

%N Number of inverse monoids of order n.

%H Martin E. Malandro, <a href="http://arxiv.org/abs/1312.7192">Enumeration of finite inverse semigroups</a>, arXiv:1312.7192 [math.CO]

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

%K nonn,hard,more

%O 1,2

%A _Joerg Arndt_, Dec 31 2013