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 A159108 #4 Feb 16 2025 08:33:10
%S A159108 1,37,893,18152,340805,6175518,110615379,1986526444,36092306837,
%T A159108 667427556805
%N A159108 Number of permutations of 1..n containing the relative rank sequence { 136542 } at any spacing.
%C A159108 Same series for 245631 532146 641235 345261 432516 162543 615234
%H A159108 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159108 A056986 A158005 A158423
%K A159108 nonn
%O A159108 6,2
%A A159108 _R. H. Hardin_ Apr 05 2009