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 A301649 #11 Feb 16 2025 08:33:53 %S A301649 0,0,1,16,120,9862 %N A301649 Number of longest cycles in the n X n knight graph. %C A301649 a(8) = 13267364410532. %H A301649 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a> %H A301649 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KnightGraph.html">Knight Graph</a> %F A301649 a(2*n) = A001230(n) for A001230(n) > 0. - _Andrew Howroyd_, Apr 16 2018 %Y A301649 Cf. A001230. %K A301649 nonn,more %O A301649 1,4 %A A301649 _Eric W. Weisstein_, Mar 25 2018