%I #8 Mar 30 2012 17:37:00
%S 0,0,0,4,38,1894
%N Number of nonisomorphic commutative idempotent groupoids with a nontrivial symmetry.
%H <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a>
%Y A030257 - A030258.
%K nonn,more
%O 0,4
%A _Christian G. Bower_