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 A308129 #9 Feb 16 2025 08:33:55 %S A308129 1,12,392,171592,364618672,6544911081900,829555065360355292, %T A308129 817534730458899350635436,6154392250018061759082363305112, %U A308129 360916610325065945171647827293872547848,165298493343313203241690299664254975948394404072 %N A308129 Number of (undirected) Hamiltonian paths on the n X n king graph. %H A308129 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a> %H A308129 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KingGraph.html">King Graph</a> %F A308129 a(n) = A158651(n)/2 for n > 1. %Y A308129 Main diagonal of A350729. %Y A308129 Cf. A140518, A158651, A272445, A288033. %K A308129 nonn,hard %O A308129 1,2 %A A308129 _Eric W. Weisstein_, May 14 2019 %E A308129 a(1) corrected by _Andrew Howroyd_, Jan 16 2022