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 A159112 #4 Feb 16 2025 08:33:10
%S A159112 1,37,893,18155,340981,6181688,110784753,1990562895,36180278147,
%T A159112 669234319093
%N A159112 Number of permutations of 1..n containing the relative rank sequence { 143652 } at any spacing.
%C A159112 Same series for 256341 521436 634125 452361 325416 163254 614523
%H A159112 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159112 A056986 A158005 A158423
%K A159112 nonn
%O A159112 6,2
%A A159112 _R. H. Hardin_ Apr 05 2009