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 A130743 #4 Sep 08 2013 13:31:20
%S A130743 1,1,1,2,3,3,4,8,11,11,8,20,34,45,45,16,48,96,152,197,197,32,112,256,
%T A130743 464,706,903,903,64,256,656,1328,2276,3376,4279,4279,128,576,1632,
%U A130743 3632,6856,11332,16514,20793,20793,256,1280,3968,9600,19680,35488,57184
%N A130743 Triangle related to super-Catalan numbers (or little Schroeder numbers).
%F A130743 T(n,k)=Sum_{m,j,m<n,j<=k}T(m,j), T(0,0)=1, T(n,k)=0 if k<0 or if k>n . T(n,n)=A001003(n) . T(n,0)=A011782(n). T(n,1)=A001792(n-1) for n>=1 . T(n,2)=A084266(n-1) for n>=2 .
%e A130743 Triangle begins:
%e A130743 1;
%e A130743 1, 1;
%e A130743 2, 3, 3;
%e A130743 4, 8, 11, 11;
%e A130743 8, 20, 34, 45, 45;
%e A130743 16, 48, 96, 152, 197, 197;
%e A130743 32, 112, 256, 464, 706, 903, 903:
%e A130743 64, 256, 656, 1328, 2276, 3376, 4279, 4279;
%e A130743 128, 576, 1632, 3632, 6856, 11332, 16514, 20793, 20793 ;...
%K A130743 nonn,tabl
%O A130743 0,4
%A A130743 _Philippe Deléham_, Jul 12 2007