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 A159111 #4 Feb 16 2025 08:33:10
%S A159111 1,37,894,18202,342307,6210961,111342243,2000144704,36331951269,
%T A159111 671452444196
%N A159111 Number of permutations of 1..n containing the relative rank sequence { 143625 } at any spacing.
%C A159111 Same series for 526341 251436 634152 462351 315426 153264 624513
%H A159111 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159111 A056986 A158005 A158423
%K A159111 nonn
%O A159111 6,2
%A A159111 _R. H. Hardin_ Apr 05 2009