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 A159126 #4 Feb 16 2025 08:33:10
%S A159126 1,37,894,18200,342224,6209179,111322536,2000336802,36349944727,
%T A159126 672095243718
%N A159126 Number of permutations of 1..n containing the relative rank sequence { 153642 } at any spacing.
%C A159126 Same series for 246351 531426 624135 425361 352416 163524 614253
%H A159126 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159126 A056986 A158005 A158423
%K A159126 nonn
%O A159126 6,2
%A A159126 _R. H. Hardin_ Apr 05 2009