A144515 Triangle read by rows: A051731 * A103451.

1, 2, 1, 2, 0, 1, 3, 1, 0, 1, 2, 0, 0, 0, 1, 4, 1, 1, 0, 0, 1, 2, 0, 0, 0, 0, 0, 1, 4, 1, 0, 1, 0, 0, 0, 1, 3, 0, 1, 0, 0, 0, 0, 0, 1, 4, 1, 0, 0, 1, 0, 0, 0, 0, 1

Offset: 0

Author

Gary W. Adamson, Nov 21 2007

Keywords

• nonn
• tabl

Comments

Row sums = A114003: (1, 3, 3, 5, 3, 7, 3, 7, 5, 7,...).

Left border = d(n), A000005: (1, 2, 2, 3, 2, 4, 2, 4,...).

Examples

			First few rows of the triangle are:
1;
2, 1;
2, 0, 1;
3, 1, 0, 1;
2, 0, 0, 0, 1;
4, 1, 1, 0, 0, 1;
2, 0, 0, 0, 0, 0, 1;
...
		

Crossrefs

Cf. A114003, A000005, A103451.

Formula

A051731 * A103451 as infinite lower triangular matrices. Left border of A051731 (all 1's) is replaced with A000005: (1, 2, 2, 3, 2, 4,...).