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 A159116 #4 Feb 16 2025 08:33:10
%S A159116 1,37,892,18102,339300,6139749,109870847,1972227424,35831253120,
%T A159116 662813023696
%N A159116 Number of permutations of 1..n containing the relative rank sequence { 145623 } at any spacing.
%C A159116 Same series for 326541 451236 632154 432651 345126 156234 621543
%H A159116 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159116 A056986 A158005 A158423
%K A159116 nonn
%O A159116 6,2
%A A159116 _R. H. Hardin_ Apr 05 2009