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 A234623 #11 Feb 16 2025 08:33:21
%S A234623 0,1,222,128769,959427728,110346440462642
%N A234623 Numbers of undirected cycles in the n X n knight graph.
%H A234623 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a>
%H A234623 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KnightGraph.html">Knight Graph</a>
%t A234623 Table[Length[FindCycle[KnightTourGraph[n, n], Infinity, All]], {n, 5}]
%K A234623 nonn
%O A234623 2,3
%A A234623 _Eric W. Weisstein_, Dec 28 2013
%E A234623 a(7) from _Ed Wynn_, Jul 08 2023