%I #15 Aug 02 2019 22:44:49
%S 0,1,1,1,1,1,2,1,1,2,3,1,1,1,3,5,1,1,1,1,5,8,1,1,2,1,1,8,13,1,1,1,1,1,
%T 1,13,21,1,1,1,3,1,1,1,21,34,1,1,2,1,1,2,1,1,34,55,1,1,1,1,5,1,1,1,1,
%U 55
%N Triangle read by rows: T(n,m) = gcd(Fibonacci(n), Fibonacci(m)).
%C Row sums are {0, 2, 3, 6, 9, 14, 22, 32, 51, 78, 123, ...}.
%C T(n,m) = Fibonacci(gcd(n,m)).
%e Table begins
%e 0;
%e 1, 1;
%e 1, 1, 1;
%e 2, 1, 1, 2;
%e 3, 1, 1, 1, 3;
%e 5, 1, 1, 1, 1, 5;
%e 8, 1, 1, 2, 1, 1, 8;
%e 13, 1, 1, 1, 1, 1, 1, 13;
%e 21, 1, 1, 1, 3, 1, 1, 1, 21;
%e 34, 1, 1, 2, 1, 1, 2, 1, 1, 34;
%e 55, 1, 1, 1, 1, 5, 1, 1, 1, 1, 55;
%t Flatten[Table[Table[GCD[Fibonacci[n], Fibonacci[m]], {m, 0, n}], {n, 0, 10}]]
%Y Cf. A000045.
%K nonn,tabl
%O 0,7
%A _Roger L. Bagula_, Nov 28 2010