A144154 A Fibonacci triangle, row sums = A023610.

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, 21, 26, 24, 25, 24, 26, 21, 55, 34, 42, 39, 40, 40, 39, 42, 34

Offset: 1

Author

Gary W. Adamson, Sep 12 2008

Keywords

• nonn
• tabl

Comments

Row sums = A023610: (1, 3, 7, 15, 30, 58,...).

Examples

			First few rows of the triangle =
1;
2, 1;
3, 2, 2;
5, 3, 4, 3;
8, 5, 6, 6, 5;
13, 8, 10, 9, 10, 8;
21, 13, 16, 15, 15, 16, 13;
34, 21, 26, 24, 25, 24, 26, 21;
... Row 4 = (5, 3, 4, 3) = termwise products of (5, 3, 2, 1) and (1, 1, 2, 3).
		

Crossrefs

A023610

Formula

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.