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%I #10 Dec 19 2015 09:50:31
%S 1,0,1,1,4,1,969,1431,729,108,56615456,75491208,37741600,8386560,
%T 697501
%N Triangle: T(n,k), k<=n: groupoids with no symmetry with n elements and k idempotents.
%H <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a>
%Y Cf. A001329, A030248, A030251, A030271.
%K nonn,tabl,more
%O 0,5
%A _Christian G. Bower_, May 15 1998
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