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.
%I A076018 #11 Dec 09 2021 00:48:04 %S A076018 1,1,2,3,4,9,34,393,13980 %N A076018 Number of systems with n elements with one binary operation satisfying the equation B(AB)=A (semisymmetric quasigroups). Isomorphic systems and systems differing by a transposition have been omitted. %Y A076018 Cf. A076016-A076021. %K A076018 nonn,hard,more %O A076018 1,3 %A A076018 Richard C. Schroeppel, Oct 29 2002