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 A159152 #4 Feb 16 2025 08:33:10
%S A159152 1,37,895,18258,344225,6263137,112585085,2027358140,36895181201,
%T A159152 682664694913
%N A159152 Number of permutations of 1..n containing the relative rank sequence { 241635 } at any spacing.
%C A159152 Same series for 536142 462513 315264
%H A159152 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159152 A056986 A158005 A158423
%K A159152 nonn
%O A159152 6,2
%A A159152 _R. H. Hardin_ Apr 05 2009