cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A076016 Number of systems with n elements having one binary operation satisfying the equation B(AB)=A (semisymmetric quasigroups).

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%I A076016 #14 Dec 09 2021 00:47:05
%S A076016 1,2,3,18,120,2880,140256,20782080,9569532672,14175610675200,
%T A076016 74559788174868480
%N A076016 Number of systems with n elements having one binary operation satisfying the equation B(AB)=A (semisymmetric quasigroups).
%C A076016 Or, Latin squares for which the set of (row,column,symbol) triples is invariant under cyclic permutation of the elements within each triple.
%H A076016 Brendan D. McKay and Ian M. Wanless, <a href="https://doi.org/10.1002/jcd.21814">Enumeration of Latin squares with conjugate symmetry</a>, J. Combin. Des. 30 (2022), 105-130.
%Y A076016 Cf. A076017-A076021, A350019, A350020.
%K A076016 nonn,hard,more
%O A076016 1,2
%A A076016 Richard C. Schroeppel, Oct 29 2002
%E A076016 a(10)-a(11) from _Ian Wanless_, Dec 08 2021