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 A131033 #12 Oct 11 2021 07:43:04 %S A131033 1,3,1,4,2,1,5,2,2,1,6,2,2,2,1,7,2,2,2,2,1,8,2,2,2,2,2,1,9,2,2,2,2,2, %T A131033 2,1,10,2,2,2,2,2,2,2,1,11,2,2,2,2,2,2,2,2,1,12,2,2,2,2,2,2,2,2,2,1, %U A131033 13,2,2,2,2,2,2,2,2,2,2,1,14,2,2,2,2,2,2,2,2,2,2,2,1 %N A131033 A130296 * A097806. %C A131033 Row sums give A016777. %C A131033 A131032 = A097806 * A130296. [corrected by _Georg Fischer_, Oct 10 2021] %F A131033 A130296 * A097806 as infinite lower triangular matrices; where A130296 = (1; 2,1; 3,1,1;...) and A097806 = the pairwise operator. %e A131033 First few rows of the triangle are: %e A131033 1; %e A131033 3, 1; %e A131033 4, 2, 1; %e A131033 5, 2, 2, 1; %e A131033 6, 2, 2, 2, 1; %e A131033 7, 2, 2, 2, 2, 1; %e A131033 ... %Y A131033 Cf. A016777, A097806, A130296. %K A131033 nonn,tabl %O A131033 1,2 %A A131033 _Gary W. Adamson_, Jun 10 2007 %E A131033 Definition corrected, a(36)=2 inserted and more terms from _Georg Fischer_, Oct 10 2021 %E A131033 More terms from _Michel Marcus_, Oct 11 2021