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%I
%S 1,0,1,38,13872,83360520,10203847031340,31023254154131753920,
%T 2765562268014305034000397632,8332535835277886736134596954072281240,
%U 960864308045670310058158724983067048253497223280
%N Number of nonisomorphic commutative groupoids with no idempotents.
%H <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a>
%Y Cf. A001329, A001425, A038021.
%K nonn
%O 0,4
%A _Christian G. Bower_, Feb 15, 1998 and May 15, 1998
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