%I #6 Mar 30 2012 17:37:11
%S 1,2,3,16,280,56448,118594560,4282251214848,3398378138678329344,
%T 75807214831601328114892800
%N Number of labeled loops (quasigroups with an identity element).
%H <a href="/index/Qua#quasigroups">Index entries for sequences related to quasigroups</a>
%Y a(n)=A000315(n)*n. Cf. A057771.
%K nonn,hard
%O 1,2
%A _Christian G. Bower_, Nov 20 2000
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