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 A159107 #4 Feb 16 2025 08:33:10
%S A159107 1,37,895,18251,343809,6248365,112174581,2017464380,36677386872,
%T A159107 678153201432
%N A159107 Number of permutations of 1..n containing the relative rank sequence { 136524 } at any spacing.
%C A159107 Same series for 425631 352146 641253 346251 431526 152643 625134
%H A159107 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159107 A056986 A158005 A158423
%K A159107 nonn
%O A159107 6,2
%A A159107 _R. H. Hardin_ Apr 05 2009