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%I #7 Mar 30 2012 17:37:11
%S 1,2,4,19,128,1344,20997,1479686
%N Number of asymmetric monoids (semigroups with identity) of order n.
%H <a href="/index/Mo#monoids">Index entries for sequences related to monoids</a>
%Y a(n)=A058136(n)*2-A058135(n).
%K nonn,hard
%O 1,2
%A _Christian G. Bower_, Nov 13 2000
%E a(8) from _Christian G. Bower_, Dec 26 2006
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