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 A131335 #2 Mar 30 2012 17:25:22 %S A131335 1,1,1,2,1,1,2,2,2,1,3,2,4,2,1,3,3,6,4,3,1,4,3,9,6,7,3,1,4,4,12,9,13, %T A131335 7,4,1,5,4,16,12,22,13,11,4,1,5,5,20,16,34,22,24,11,5,1 %N A131335 A000012 * A131334. %C A131335 Row sums = A000071, Fibonacci numbers - 1, starting (1, 2, 4, 7, 12, 20, 33,...). %F A131335 A000012 * A131334 as infinite lower triangular matrices, where A000012 = (1; 1,1; 1,1,1;...). %e A131335 First few rows of the triangle are: %e A131335 1; %e A131335 1, 1; %e A131335 2, 1, 1; %e A131335 2, 2, 2, 1; %e A131335 3, 2, 4, 2, 1; %e A131335 3, 3, 6, 4, 3, 1; %e A131335 4, 3, 9, 6, 7, 3, 1; %e A131335 ... %Y A131335 Cf. A000071, A131334, A000012, A131332, A131333. %K A131335 nonn,tabl %O A131335 1,4 %A A131335 _Gary W. Adamson_, Jun 29 2007