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 A159127 #4 Feb 16 2025 08:33:10
%S A159127 1,37,891,18042,337138,6078572,108365293,1938295834,35109616512,
%T A159127 648055261057
%N A159127 Number of permutations of 1..n containing the relative rank sequence { 154326 } at any spacing.
%C A159127 Same series for 623451
%H A159127 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159127 A056986 A158005 A158423
%K A159127 nonn
%O A159127 6,2
%A A159127 _R. H. Hardin_ Apr 05 2009