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 A159123 #4 Feb 16 2025 08:33:10
%S A159123 1,37,893,18148,340541,6165196,110301827,1978314150,35896762843
%N A159123 Number of permutations of 1..n containing the relative rank sequence { 153426 } at any spacing.
%C A159123 Same series for 624351
%H A159123 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159123 A056986 A158005 A158423
%K A159123 nonn
%O A159123 6,2
%A A159123 _R. H. Hardin_ Apr 05 2009