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 A159128 #4 Feb 16 2025 08:33:10
%S A159128 1,37,893,18153,340861,6177339,110660482,1987467395,36109604437,
%T A159128 667712205688
%N A159128 Number of permutations of 1..n containing the relative rank sequence { 154362 } at any spacing.
%C A159128 Same series for 263451 514326 623415 523461 254316 164325 613452
%H A159128 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159128 A056986 A158005 A158423
%K A159128 nonn
%O A159128 6,2
%A A159128 _R. H. Hardin_ Apr 05 2009