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 A159089 #4 Feb 16 2025 08:33:10
%S A159089 1,37,891,18042,337148,6079368,108401655,1939557678,35146756581,
%T A159089 649036979911
%N A159089 Number of permutations of 1..n containing the relative rank sequence { 132465 } at any spacing.
%C A159089 Same series for 645321 132456 123546 654231 564231 213546 645312 456231 321546 132654 645123
%H A159089 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159089 A056986 A158005 A158423
%K A159089 nonn
%O A159089 6,2
%A A159089 _R. H. Hardin_ Apr 05 2009