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 A241799 #6 Apr 28 2014 19:02:31 %S A241799 1,66,1582,21895,215849,1685957,11051141,63115364,322683730, %T A241799 1503863212,6488505684,26177296409,99733640537,361023920432, %U A241799 1250117445742,4157235614630,13341716405949,41433896651428,124970671492315,366791960890982,1050487889623924 %N A241799 Number of ballot sequences of length n having exactly six descents. %e A241799 a(10) = 1: [1,2,1,3,2,1,4,3,2,1]. %Y A241799 Column k=6 of A238121 and of A238122. %K A241799 nonn %O A241799 10,2 %A A241799 _Joerg Arndt_ and _Alois P. Heinz_, Apr 28 2014