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 A131344 #5 Jan 01 2013 07:08:24 %S A131344 1,2,1,3,2,1,5,4,3,1,8,7,8,3,1,13,12,18,9,4,1,21,20,38,21,14,4,1,34, %T A131344 33,76,47,39,15,5,1,55,54,147,97,100,43,21,5,1,89,88,277,194,236,115, %U A131344 69,22,6,1 %N A131344 A046854 * A065941. %C A131344 Left border = Fibonacci numbers starting with F(2). Row sums = A131246: (1, 3, 6, 13, 27, 57,...). A131345 = A065941 * A046854. %F A131344 A046854 * A065941 as infinite lower triangular matrices. %e A131344 First few rows of the triangle are: %e A131344 1; %e A131344 2, 1; %e A131344 3, 2, 1; %e A131344 5, 4, 3, 1; %e A131344 8, 7, 8, 3, 1; %e A131344 13, 12, 18, 9, 4, 1; %e A131344 ... %Y A131344 Cf. A046854, A065941, A131246, A131345. %K A131344 nonn,tabl %O A131344 0,2 %A A131344 _Gary W. Adamson_, Jun 30 2007