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 A159110 #4 Feb 16 2025 08:33:10
%S A159110 1,37,893,18154,340937,6180603,110766150,1990357262,36180430112,
%T A159110 669322808727
%N A159110 Number of permutations of 1..n containing the relative rank sequence { 143562 } at any spacing.
%C A159110 Same series for 265341 512436 634215 542361 235416 163245 614532
%H A159110 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159110 A056986 A158005 A158423
%K A159110 nonn
%O A159110 6,2
%A A159110 _R. H. Hardin_ Apr 05 2009