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%I #11 Dec 09 2021 00:48:23
%S 0,0,0,1,3,6,24,178,1328
%N Number of systems with n elements with one binary operation satisfying the equation B(AB)=A (semisymmetric quasigroups). This gives numbers of systems which are isomorphic to their transpose but are noncommutative.
%Y Cf. A076016-A076021.
%K nonn,hard,more
%O 1,5
%A Richard C. Schroeppel, Oct 29 2002
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