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 A262135 #4 Sep 11 2015 19:41:40 %S A262135 1,1,1,3,9,45,225,1575,11025,99225,893025,9823275,108056024, %T A262135 1404728312,18261451790,273921776850,4108787293579,69849383990843, %U A262135 1187387325581683,22560359186051977,428591632052426778,9000424273100962338,188954690005716285164 %N A262135 Number of permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value <= 10. %H A262135 Alois P. Heinz, <a href="/A262135/b262135.txt">Table of n, a(n) for n = 0..200</a> %F A262135 a(n) = A262124(n,10). %Y A262135 Column k=10 of A262124. %K A262135 nonn %O A262135 0,4 %A A262135 _Alois P. Heinz_, Sep 11 2015