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 A131035 #11 Jul 13 2024 01:42:59 %S A131035 1,2,1,4,1,1,5,2,1,1,6,2,2,1,1,7,2,2,2,1,1,8,2,2,2,2,1,1,9,2,2,2,2,2, %T A131035 1,1,10,2,2,2,2,2,2,1,1 %N A131035 A051340 * A129686 as infinite lower triangular matrices. %C A131035 Row sums give A008486. %e A131035 First few rows of the triangle: %e A131035 1; %e A131035 2, 1; %e A131035 4, 1, 1; %e A131035 5, 2, 1, 1; %e A131035 6, 2, 2, 1, 1; %e A131035 7, 2, 2, 2, 1, 1; %e A131035 8, 2, 2, 2, 2, 1, 1; %e A131035 9, 2, 2, 2, 2, 2, 1, 1; %e A131035 10, 2, 2, 2, 2, 2, 2, 1, 1; %e A131035 ... %Y A131035 Cf. A051340, A129686, A008486, A131034. %K A131035 nonn,tabl,more %O A131035 1,2 %A A131035 _Gary W. Adamson_, Jun 10 2007