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 A158429 #4 Feb 16 2025 08:33:09
%S A158429 1,26,460,7066,102595,1464870,21016266,306985344,4605989539,
%T A158429 71438420743,1150819170703
%N A158429 Number of permutations of 1..n containing the relative rank sequence { 42531 } at any spacing.
%C A158429 Same series for 35241 31425 14253 52413 24135 13524 53142
%H A158429 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A158429 A056986 A158005
%K A158429 nonn
%O A158429 5,2
%A A158429 _R. H. Hardin_ Mar 18 2009