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 A133114 #2 Mar 30 2012 17:25:25 %S A133114 1,1,1,2,1,1,2,2,3,1,3,2,7,3,1,3,3,13,7,5,1,4,3,22,13,16,5,1,4,4,34, %T A133114 22,40,16,7,1,5,4,50,34,86,40,29,7,1,5,5,70,50,166,86,91,29,9,1 %N A133114 A000012 * A007318 * A133080. %C A133114 Row sums = 2^n %F A133114 A000012(signed) * A007318 * A133080 as infinite lower triangular matrices, where A000012(signed) = [1; -1,1; 1,-1,1; -1,1,-1,1;...). %e A133114 First few rows of the triangle are: %e A133114 1; %e A133114 1, 1; %e A133114 2, 1, 1; %e A133114 2, 2, 3, 1; %e A133114 3, 2, 7, 3, 1; %e A133114 3, 3, 13, 7, 5, 1; %e A133114 4, 3, 22, 13, 16, 5, 1; %e A133114 4, 4, 34, 22, 40, 16, 7, 1; %e A133114 ... %Y A133114 Cf. A000012, A133080, A007318. %K A133114 nonn,tabl %O A133114 1,4 %A A133114 _Gary W. Adamson_, Sep 14 2007