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 A159101 #6 Feb 16 2025 08:33:10
%S A159101 1,37,894,18205,342507,6218802,111580019,2006343205,36478531062,
%T A159101 674696743045
%N A159101 Number of permutations of 1..n containing the relative rank sequence { 135624 } at any spacing.
%C A159101 Same series for 426531 351246 642153 436251 341526 152634 625143.
%H A159101 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PermutationPattern.html">Permutation Pattern</a>
%Y A159101 Cf. A056986, A158005, A158423.
%K A159101 nonn
%O A159101 6,2
%A A159101 _R. H. Hardin_, Apr 05 2009