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 A144330 #4 Jun 02 2025 00:35:01 %S A144330 1,2,1,4,3,2,7,6,5,3,11,10,9,7,4,16,15,14,12,9,5,22,21,20,18,15,11,6, %T A144330 29,28,27,25,22,18,13,7,37,36,35,33,30,26,21,15,8,46,45,44,42,39,35, %U A144330 30,24,17,9,56,55,54,52,49,45,40,34,27,19,10 %N A144330 Triangle read by rows, A144328 * A000012. %C A144330 Row sums = A064999: (1, 3, 9, 21, 41, 113,...). %C A144330 Left border = A000124: (1, 2, 4, 7, 11, 16, 22, 29,...). %F A144330 Triangle read by rows, partial sums of A144328 starting from the right. %e A144330 First few rows of the triangle = %e A144330 1; %e A144330 2, 1 %e A144330 4, 3, 2 %e A144330 7, 6, 5, 3; %e A144330 11, 10, 9, 7, 4; %e A144330 16, 15, 14, 12, 9, 5; %e A144330 22, 21, 20, 18, 15, 11, 6; %e A144330 29, 28, 27, 25, 22, 18, 13, 7; %e A144330 ... %e A144330 Row 4 = (7, 6, 5, 3) = partial sums from the right of triangle A144328, row 4: (1, 1, 2, 3). %Y A144330 A144328, Cf. A064999, A000124 %K A144330 nonn,tabl %O A144330 1,2 %A A144330 _Gary W. Adamson_, Sep 18 2008