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%I #12 Jan 26 2022 14:20:13
%S 1,1,3,9,39,201,1258,10013,142755
%N Number of commutative asymmetric semigroups of order n.
%H <a href="/index/Se#semigroups">Index entries for sequences related to semigroups</a>
%F a(n) = A079201(n, A027423(n)).
%Y Cf. A001426, A079201.
%K nonn,hard
%O 0,3
%A _Christian G. Bower_, Nov 09 2000
%E Updated Feb 19 2001.
%E a(7) corrected Dec 26 2006
%E a(8) from _Andrew Howroyd_, Jan 26 2022
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