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 A159150 #4 Feb 16 2025 08:33:10
%S A159150 1,37,895,18260,344343,6267224,112694769,2029897554,36948746293,
%T A159150 683727143559
%N A159150 Number of permutations of 1..n containing the relative rank sequence { 236415 } at any spacing.
%C A159150 Same series for 514632 263145 541362 413562 364215 265314 512463
%H A159150 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159150 A056986 A158005 A158423
%K A159150 nonn
%O A159150 6,2
%A A159150 _R. H. Hardin_ Apr 05 2009