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 A350729 #13 Feb 16 2025 08:34:02 %S A350729 1,1,1,1,12,1,1,48,48,1,1,208,392,208,1,1,768,4678,4678,768,1,1,2752, %T A350729 43676,171592,43676,2752,1,1,9472,406396,4743130,4743130,406396,9472, %U A350729 1,1,32000,3568906,132202038,364618672,132202038,3568906,32000,1 %N A350729 Array read by antidiagonals: T(m,n) is the number of (undirected) Hamiltonian paths in the m X n king graph. %H A350729 Andrew Howroyd, <a href="/A350729/b350729.txt">Table of n, a(n) for n = 1..231</a> %H A350729 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HamiltonianPath.html">Hamiltonian Path</a> %H A350729 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KingGraph.html">King Graph</a> %F A350729 T(m,n) = T(n,m). %e A350729 Array begins: %e A350729 =========================================================== %e A350729 m\n | 1 2 3 4 5 6 ... %e A350729 ----+------------------------------------------------------ %e A350729 1 | 1 1 1 1 1 1 ... %e A350729 2 | 1 12 48 208 768 2752 ... %e A350729 3 | 1 48 392 4678 43676 406396 ... %e A350729 4 | 1 208 4678 171592 4743130 132202038 ... %e A350729 5 | 1 768 43676 4743130 364618672 28808442502 ... %e A350729 6 | 1 2752 406396 132202038 28808442502 6544911081900 ... %e A350729 ... %Y A350729 Rows 1..5 are A000012, A339760, A339761, A339762, A339763. %Y A350729 Main diagonal is A308129. %Y A350729 Cf. A272445, A307026, A329118, A339098, A339190. %K A350729 nonn,tabl %O A350729 1,5 %A A350729 _Andrew Howroyd_, Jan 16 2022