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 A104766 #7 Mar 30 2012 17:25:11
%S A104766 1,2,1,5,2,1,10,5,2,1,20,10,5,2,1,38,20,10,5,2,1,71,38,20,10,5,2,1,
%T A104766 130,71,38,20,10,5,2,1
%N A104766 Triangle T(n,k) = A001629(n-k+2) read by rows, 1<=k<=n.
%C A104766 The triangle is the matrix square of the triangle A104762: T(n,k) = sum_{j= k..n} A104762(n,j)*A104762(j,k).
%e A104766 First few rows of the triangle:
%e A104766 1;
%e A104766 2, 1;
%e A104766 5, 2, 1;
%e A104766 10, 5, 2, 1;
%e A104766 20, 10, 5, 2, 1;
%e A104766 38, 20, 10, 5, 2, 1;
%e A104766 71, 38, 20, 10, 5, 2, 1;
%e A104766 ...
%Y A104766 Cf. A001629, A104762, A104763, A006478 (row sums).
%K A104766 nonn,tabl
%O A104766 1,2
%A A104766 _Gary W. Adamson_, Mar 24 2005