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A030253 Number of nonisomorphic groupoids with 1 idempotent. 2

%I

%S 1,4,1485,75503872,1017252851596875,5757133327963849592814528,

%T 20215881652044379995902152075055222830,

%U 61135717735233219050448568789931104340315383312314368

%N Number of nonisomorphic groupoids with 1 idempotent.

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

%K nonn

%O 1,2

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

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Last modified January 22 10:05 EST 2022. Contains 350481 sequences. (Running on oeis4.)