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Number of nonisomorphic groupoids with no idempotents.
2

%I #12 Feb 15 2015 02:16:07

%S 1,0,3,978,56630832,813802235250650,4797611106478930201025520,

%T 17327898558894838031017212608777367670,

%U 53493753018329066207577438898229132113128344235601408

%N Number of nonisomorphic groupoids with no idempotents.

%H <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a>

%Y Cf. A001329, A038018.

%K nonn

%O 0,3

%A _Christian G. Bower_, Feb 15 1998 and May 15 1998