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 A159118 #4 Feb 16 2025 08:33:10
%S A159118 1,37,895,18253,343913,6251581,112251815,2019055149,36706840992,
%T A159118 678654881020
%N A159118 Number of permutations of 1..n containing the relative rank sequence { 146253 } at any spacing.
%C A159118 Same series for 352641 425136 631524
%H A159118 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159118 A056986 A158005 A158423
%K A159118 nonn
%O A159118 6,2
%A A159118 _R. H. Hardin_ Apr 05 2009