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 A159115 #4 Feb 16 2025 08:33:10
%S A159115 1,37,893,18151,340722,6171747,110487973,1982914085,36000845891,
%T A159115 665283251217
%N A159115 Number of permutations of 1..n containing the relative rank sequence { 145326 } at any spacing.
%C A159115 Same series for 623541 154236 632451
%H A159115 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159115 A056986 A158005 A158423
%K A159115 nonn
%O A159115 6,2
%A A159115 _R. H. Hardin_ Apr 05 2009