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 A152201 #4 Jun 02 2025 01:13:28 %S A152201 1,2,3,1,4,2,5,4,1,6,6,2,7,9,5,1,8,12,8,2,9,16,14,6,1,10,20,20,10,2, %T A152201 11,25,30,20,7,1,12,30,40,30,12,2,13,36,55,50,27,8,1 %N A152201 Triangle read by rows, A000012 * A152198. %C A152201 Row sums = A027383: (1, 2, 4, 6, 10, 14, 22, 30,...). %F A152201 A000012 * A152198 = partial sums of A152198 column terms. %e A152201 First few rows of the triangle = %e A152201 1; %e A152201 2; %e A152201 3, 1; %e A152201 4, 2; %e A152201 5, 4, 1; %e A152201 6, 6, 2; %e A152201 7, 9, 5, 1; %e A152201 8, 12, 8, 2; %e A152201 9, 16, 14, 6, 1; %e A152201 10, 10, 20, 20, 2; %e A152201 11, 25, 30, 20, 7, 1; %e A152201 12, 30, 40, 30, 12, 2; %e A152201 13, 36, 55, 50, 27, 8, 1; %e A152201 ... %Y A152201 A152198, A027383 %K A152201 nonn,tabl %O A152201 0,2 %A A152201 _Gary W. Adamson_, Nov 29 2008