This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A234844 #7 Dec 31 2013 12:35:59 %S A234844 1,2,4,11,27,89,310,1311,6253,34325,212247,1466180,11167987,92889294, %T A234844 836021796 %N A234844 Number of inverse monoids of order n. %H A234844 Martin E. Malandro, <a href="http://arxiv.org/abs/1312.7192">Enumeration of finite inverse semigroups</a>, arXiv:1312.7192 [math.CO] %Y A234844 Cf. A001428 (inverse semigroups), A234843 (commutative inverse semigroups), A234845 (commutative inverse monoids). %K A234844 nonn,hard,more %O A234844 1,2 %A A234844 _Joerg Arndt_, Dec 31 2013