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 A158437 #4 Feb 16 2025 08:33:10
%S A158437 1,26,460,7064,102510,1462680,20971656,306191550,4593023012,
%T A158437 71238398197,1147853638792
%N A158437 Number of permutations of 1..n containing the relative rank sequence { 52431 } at any spacing.
%C A158437 Same series for 53241 13425 14235
%H A158437 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A158437 A056986 A158005
%K A158437 nonn
%O A158437 5,2
%A A158437 _R. H. Hardin_ Mar 18 2009