%I A058132
%S A058132 1,2,5,19,84,509,3901,48957
%N A058132 Number of self-converse monoids (semigroups with identity) of order n.
%H A058132 <a href="Sindx_Mo.html#monoids">Index entries for sequences related to 
               monoids</a>
%Y A058132 a(n)=A058133(n)*2-A058129(n).
%Y A058132 Sequence in context: A058131 A138911 A107377 this_sequence A002851 A124348 
               A052324
%Y A058132 Adjacent sequences: A058129 A058130 A058131 this_sequence A058133 A058134 
               A058135
%K A058132 nonn,more
%O A058132 1,2
%A A058132 Christian G. Bower (bowerc(AT)usa.net), Nov 13 2000
%E A058132 a(8) from Max Alekseyev (maxale(AT)gmail.com), Jul 13 2009