%I A058131
%S A058131 1,2,5,19,78,421,2637
%N A058131 Number of commutative monoids (commutative semigroups with identity) 
               of order n.
%D A058131 S. Wolfram, A New Kind of Science. Champaign, IL: Wolfram Media, p. 952, 
               2002.
%H A058131 Eric Postpischil <a href="http://groups.google.com/groups?&hl=en&lr=&ie=UTF-8&selm=11802%40shlump.nac.dec.com\
               &rnum=2">Posting to sci.math newsgroup, May 21 1990</a>
%H A058131 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               CommutativeMonoid.html">Commutative Monoid</a>
%H A058131 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               AdditiveCellularAutomaton.html">Additive Cellular Automaton</a>
%H A058131 <a href="Sindx_Mo.html#monoids">Index entries for sequences related to 
               monoids</a>
%Y A058131 Sequence in context: A014273 A150026 A150027 this_sequence A138911 A107377 
               A058132
%Y A058131 Adjacent sequences: A058128 A058129 A058130 this_sequence A058132 A058133 
               A058134
%K A058131 nonn,more
%O A058131 1,2
%A A058131 Christian G. Bower (bowerc(AT)usa.net), Nov 13 2000