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 A307929 #7 Feb 16 2025 08:33:55 %S A307929 0,1,4,396,553008,4701600128,1782158930138112,3276113857736492040192 %N A307929 Number of (undirected) Hamiltonian cycles in the n X n white bishop graph. %H A307929 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianCycle.html">Hamiltonian Cycle</a> %H A307929 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/WhiteBishopGraph.html">White Bishop Graph</a> %F A307929 a(n) = A282890(n)/2. %Y A307929 Cf. A282890. %K A307929 nonn,more,hard %O A307929 2,3 %A A307929 _Eric W. Weisstein_, May 06 2019