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 A131243 #16 Jan 24 2023 02:27:44 %S A131243 1,2,1,3,2,1,5,4,4,1,8,7,10,4,1,13,12,23,12,6,1,21,20,48,29,21,6,1,34, %T A131243 33,96,64,62,24,8,1,55,54,185,132,160,74,36,8,1,89,88,348,261,382,200, %U A131243 130,40,10,1,144,143,642,500,859,492,400,150,55,10,1 %N A131243 A065941^2 as an infinite lower triangular matrix. %C A131243 Left border, Fibonacci numbers; next border to the right, (Fibonacci numbers - 1). %H A131243 Hakan Icoz, <a href="/A131243/b131243.txt">Rows 0..100, flattened</a> %e A131243 First few rows of the triangle: %e A131243 1; %e A131243 2, 1; %e A131243 3, 2, 1; %e A131243 5, 4, 4, 1; %e A131243 8, 7, 10, 4, 1; %e A131243 13, 12, 23, 12, 6, 1; %e A131243 21, 20, 48, 29, 21, 6, 1; %e A131243 34, 33, 96, 64, 62, 24, 8, 1; %e A131243 55, 54, 185, 132, 160, 74, 36, 8, 1; %e A131243 89, 88, 348, 261, 382, 200, 130, 40, 10, 1; %Y A131243 Cf. A065941, A131244 (row sums), A131245, A131246. %K A131243 nonn,tabl %O A131243 0,2 %A A131243 _Gary W. Adamson_, Jun 22 2007 %E A131243 Data and Example corrected by _Jon E. Schoenfield_, Feb 26 2022 %E A131243 More terms from _Hakan Icoz_, Jan 23 2023