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 A159100 #4 Feb 16 2025 08:33:10
%S A159100 1,37,893,18152,340829,6177089,110675964,1988334936,36138726192,
%T A159100 668508463219
%N A159100 Number of permutations of 1..n containing the relative rank sequence { 135462 } at any spacing.
%C A159100 Same series for 264531 513246 642315 534261 243516 162435 615342
%H A159100 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159100 A056986 A158005 A158423
%K A159100 nonn
%O A159100 6,2
%A A159100 _R. H. Hardin_ Apr 05 2009