%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