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 A159084 #4 Feb 16 2025 08:33:10 %S A159084 1,37,892,18103,339346,6140960,109894287,1972580175,35835001869, %T A159084 662818949341 %N A159084 Number of permutations of 1..n containing the relative rank sequence { 124563 } at any spacing. %C A159084 Same series for 365421 412356 653214 543621 234156 126345 651432 365412 412365 214563 563214 543612 234165 216345 561432 %H A159084 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a> %Y A159084 A056986 A158005 A158423 %K A159084 nonn %O A159084 6,2 %A A159084 _R. H. Hardin_ Apr 05 2009