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 A159129 #4 Feb 16 2025 08:33:10
%S A159129 1,37,893,18156,341051,6184486,110869930,1992773061,36232056820
%N A159129 Number of permutations of 1..n containing the relative rank sequence { 154623 } at any spacing.
%C A159129 Same series for 326451 451326 623154 423651 354126 156324 621453
%H A159129 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159129 A056986 A158005 A158423
%K A159129 nonn
%O A159129 6,2
%A A159129 _R. H. Hardin_ Apr 05 2009