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 A159153 #4 Feb 16 2025 08:33:10
%S A159153 1,37,895,18256,344094,6258148,112439098,2023699784,36812192538,
%T A159153 680904631479
%N A159153 Number of permutations of 1..n containing the relative rank sequence { 241653 } at any spacing.
%C A159153 Same series for 356142 421635 536124 452613 325164 316254 461523
%H A159153 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159153 A056986 A158005 A158423
%K A159153 nonn
%O A159153 6,2
%A A159153 _R. H. Hardin_ Apr 05 2009