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 A360913 #10 Feb 16 2025 08:34:04 %S A360913 1,2,2,3,1,3,4,1,1,4,5,1,7,1,5,6,1,17,17,1,6,7,1,31,90,31,1,7,8,1,8, %T A360913 284,284,8,1,8,9,1,40,9,1398,9,40,1,9,10,1,120,163,10,10,163,120,1,10, %U A360913 11,1,8,1329,382,23,382,1329,8,1,11,12,1,64,128,6098,190,190,6098,128,64,1,12 %N A360913 Array read by antidiagonals: T(m,n) is the number of maximum induced cycles in the grid graph P_m X P_n. %C A360913 A maximum induced cycle is an induced cycle of longest length. %H A360913 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/GridGraph.html">Grid Graph</a>. %F A360913 T(m,n) = T(n,m). %e A360913 Array begins: %e A360913 ========================================= %e A360913 m\n| 2 3 4 5 6 7 8 9 ... %e A360913 ---+------------------------------------- %e A360913 2 | 1 2 3 4 5 6 7 8 ... %e A360913 3 | 2 1 1 1 1 1 1 1 ... %e A360913 4 | 3 1 7 17 31 8 40 120 ... %e A360913 5 | 4 1 17 90 284 9 163 1329 ... %e A360913 6 | 5 1 31 284 1398 10 382 6098 ... %e A360913 7 | 6 1 8 9 10 23 190 388 ... %e A360913 8 | 7 1 40 163 382 190 2100 80 ... %e A360913 9 | 8 1 120 1329 6098 388 80 6840 ... %e A360913 ... %Y A360913 Main diagonal is A360914. %Y A360913 Cf. A360196 (induced cycles), A360915 (lengths), A360916, A360918. %K A360913 nonn,tabl %O A360913 2,2 %A A360913 _Andrew Howroyd_, Feb 26 2023