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 A159155 #4 Feb 16 2025 08:33:10
%S A159155 1,37,894,18214,343054,6238601,112139093,2019997237,36782390957
%N A159155 Number of permutations of 1..n containing the relative rank sequence { 245163 } at any spacing.
%C A159155 Same series for 361542 416235 532614
%H A159155 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159155 A056986 A158005 A158423
%K A159155 nonn
%O A159155 6,2
%A A159155 _R. H. Hardin_ Apr 05 2009