%I #15 Dec 19 2021 13:50:34
%S 1,4,378,2798336,3973658465625,1842282678468471349824,
%T 433296503176904197061300041939288,
%U 74235003800935257803650942510752495927455127552
%N Number of pointed (distinguished element) idempotent groupoids.
%H <a href="/index/Gre#groupoids">Index entries for sequences related to groupoids</a>
%F Here fixF[n] = n(1)*Product_{i, j >= 1}(Sum_{d|[i, j]}(d*n(d))^((i, j)*n(i)*n(j)-(i=j)n(i))).
%Y Cf. A001329, A030247.
%K nonn
%O 1,2
%A _Christian G. Bower_, May 15 1998