%I #9 Mar 30 2012 17:37:00
%S 0,0,2,9,15376
%N Number of nonisomorphic groupoids with no idempotents and a nontrivial symmetry.
%H <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a>
%Y Cf. A030250 - A030251.
%K nonn,more
%O 0,3
%A _Christian G. Bower_