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 A241777 #3 Apr 28 2014 11:21:56 %S A241777 1,4,23,104,510,2411,11661,57226,283833,1434373,7346663,38317226, %T A241777 202773341,1091360787,5961577175,33093602158,186413366123, %U A241777 1066200757106,6185213644077,36404110664402,217206981954701,1313899575466329,8052745347023754,50003529679287381 %N A241777 Number of standard Young tableaux with n cells and exactly six successions. %C A241777 A succession is a pair of cells (v, v+1) lying in the same row. %C A241777 Also number of ballot sequences having six flat steps. %Y A241777 Column k=6 of A238125. %K A241777 nonn %O A241777 7,2 %A A241777 _Joerg Arndt_ and _Alois P. Heinz_, Apr 28 2014