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 A159106 #4 Feb 16 2025 08:33:10
%S A159106 1,37,894,18202,342355,6214207,111471456,2004122703,36437169504,
%T A159106 673975111446
%N A159106 Number of permutations of 1..n containing the relative rank sequence { 136452 } at any spacing.
%C A159106 Same series for 254631 523146 641325 354261 423516 162453 615324
%H A159106 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159106 A056986 A158005 A158423
%K A159106 nonn
%O A159106 6,2
%A A159106 _R. H. Hardin_ Apr 05 2009