%I A058130
%S A058130 1,2,4,19,128,1344,20997,1479686
%N A058130 Number of asymmetric monoids (semigroups with identity) of order n.
%H A058130 <a href="Sindx_Mo.html#monoids">Index entries for sequences related to 
               monoids</a>
%Y A058130 a(n)=A058136(n)*2-A058135(n).
%Y A058130 Sequence in context: A018273 A047092 A064228 this_sequence A046082 A048774 
               A061213
%Y A058130 Adjacent sequences: A058127 A058128 A058129 this_sequence A058131 A058132 
               A058133
%K A058130 nonn,hard
%O A058130 1,2
%A A058130 Christian G. Bower (bowerc(AT)usa.net), Nov 13 2000
%E A058130 a(8) from Christian G. Bower (bowerc(AT)usa.net), Dec 26 2006