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 A159105 #4 Feb 16 2025 08:33:10
%S A159105 1,37,896,18300,345279,6283563,112917410,2031975924,36947165614,
%T A159105 683007388087
%N A159105 Number of permutations of 1..n containing the relative rank sequence { 136425 } at any spacing.
%C A159105 Same series for 524631 253146 641352 364251 413526 152463 625314
%H A159105 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159105 A056986 A158005 A158423
%K A159105 nonn
%O A159105 6,2
%A A159105 _R. H. Hardin_ Apr 05 2009