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 A152193 #9 Jan 22 2023 08:37:44 %S A152193 1,1,1,1,1,3,1,6,2,1,10,10,1,15,30,4,1,21,70,28,1,28,140,112,9,1,36, %T A152193 252,336,81,1,45,420,840,405,21,1,55,660,1848,1485,231,1,66,990,3696, %U A152193 4455,1386,50 %N A152193 Triangle read by rows, A034839 * (A027826 * 0^(n-k)). %C A152193 Row sums = A027826, the eigensequence of triangle A034839. %F A152193 A034839 * (A027826 * 0^(n-k)) = A034839 * an infinite lower triangular matrix with A027826: (1, 1, 2, 4, 9, 21, 50, 120,...) and the rest zeros. %e A152193 First few rows of the triangle = %e A152193 1; %e A152193 1; %e A152193 1, 1; %e A152193 1, 3; %e A152193 1, 6, 2; %e A152193 1, 10, 10; %e A152193 1, 15, 30, 4; %e A152193 1, 21, 70, 28; %e A152193 1, 28, 140, 112, 9; %e A152193 1, 36, 252, 336, 81; %e A152193 1, 45, 420, 840, 405, 21; %e A152193 1, 55, 660, 1848, 1485, 231; %e A152193 1, 66, 990, 3696, 4455, 1386, 50; %e A152193 ... %Y A152193 Cf. A034839, A027826. %K A152193 nonn,tabf,more %O A152193 0,6 %A A152193 _Gary W. Adamson_, Nov 28 2008