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 A159087 #4 Feb 16 2025 08:33:10
%S A159087 1,37,893,18149,340635,6169711,110458898,1982842808,36012586968,
%T A159087 665794484782
%N A159087 Number of permutations of 1..n containing the relative rank sequence { 126435 } at any spacing.
%C A159087 Same series for 534621 243156 651342 364521 413256 125463 652314 364512 413265 215463 562314 534612 243165 216435 561342
%H A159087 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159087 A056986 A158005 A158423
%K A159087 nonn
%O A159087 6,2
%A A159087 _R. H. Hardin_ Apr 05 2009