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 A159122 #4 Feb 16 2025 08:33:10
%S A159122 1,37,893,18154,340923,6179688,110731088,1989321366,36154199709,
%T A159122 668721956084
%N A159122 Number of permutations of 1..n containing the relative rank sequence { 146532 } at any spacing.
%C A159122 Same series for 235641 542136 631245 342561 435216 165243 612534
%H A159122 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159122 A056986 A158005 A158423
%K A159122 nonn
%O A159122 6,2
%A A159122 _R. H. Hardin_ Apr 05 2009