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 A158425 #4 Feb 16 2025 08:33:09
%S A158425 1,26,462,7136,104123,1491822,21438666,313144000,4691684510,
%T A158425 72594030500
%N A158425 Number of permutations of 1..n containing the relative rank sequence { 41352 } at any spacing.
%C A158425 Same series for 25314
%H A158425 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A158425 A056986 A158005
%K A158425 nonn
%O A158425 5,2
%A A158425 _R. H. Hardin_ Mar 18 2009