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 A159148 #4 Feb 16 2025 08:33:10
%S A159148 1,37,894,18219,343295,6245377,112283818,2022569354,36821516540,
%T A159148 681544409462
%N A159148 Number of permutations of 1..n containing the relative rank sequence { 236145 } at any spacing.
%C A159148 Same series for 541632 412563 365214
%H A159148 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159148 A056986 A158005 A158423
%K A159148 nonn
%O A159148 6,2
%A A159148 _R. H. Hardin_ Apr 05 2009