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 A144154 #4 Jun 02 2025 00:34:07 %S A144154 1,2,1,3,2,2,5,3,4,5,8,5,6,6,5,13,8,10,9,10,8,21,13,16,15,15,16,13,34, %T A144154 21,26,24,25,24,26,21,55,34,42,39,40,40,39,42,34 %N A144154 A Fibonacci triangle, row sums = A023610. %C A144154 Row sums = A023610: (1, 3, 7, 15, 30, 58,...). %F A144154 The triangle as an infinite lower triangular matrix = A * B. A = a Fibonacci subsequences decrescendo triangle: (1; 2,1; 3,2,1; 5,3,2,1;...) and B = A127647, an infinite lower triangular matrix with the Fibonacci sequence as the main diagonal and the rest zeros. %e A144154 First few rows of the triangle = %e A144154 1; %e A144154 2, 1; %e A144154 3, 2, 2; %e A144154 5, 3, 4, 3; %e A144154 8, 5, 6, 6, 5; %e A144154 13, 8, 10, 9, 10, 8; %e A144154 21, 13, 16, 15, 15, 16, 13; %e A144154 34, 21, 26, 24, 25, 24, 26, 21; %e A144154 ... Row 4 = (5, 3, 4, 3) = termwise products of (5, 3, 2, 1) and (1, 1, 2, 3). %Y A144154 A023610 %K A144154 nonn,tabl %O A144154 1,2 %A A144154 _Gary W. Adamson_, Sep 12 2008