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 A159093 #4 Feb 16 2025 08:33:10
%S A159093 1,37,893,18155,340960,6180218,110724545,1988664448,36129031223,
%T A159093 667983854845
%N A159093 Number of permutations of 1..n containing the relative rank sequence { 134526 } at any spacing.
%C A159093 Same series for 625431 152346 643251
%H A159093 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159093 A056986 A158005 A158423
%K A159093 nonn
%O A159093 6,2
%A A159093 _R. H. Hardin_ Apr 05 2009