A131373 A046854 + A065941 - A000012.

1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 5, 2, 1, 1, 3, 6, 6, 3, 1, 1, 3, 10, 7, 10, 3, 1, 1, 4, 11, 14, 14, 11, 4, 1, 1, 4, 16, 15, 29, 15, 16, 4, 1, 1, 5, 17, 26, 35, 35, 26, 17, 5, 1

Offset: 0

Author

Gary W. Adamson, Jul 03 2007

Keywords

• nonn
• tabl

Comments

Row sums = A131269: (1, 2, 3, 6, 11, 20, 35, 60,...).

Examples

			First few rows of the triangle are:
1;
1, 1;
1, 1, 1;
1, 2, 2, 1;
1, 2, 5, 2, 1;
1, 3, 6, 6, 3, 1;
1, 3, 10, 7, 10, 3, 1;
1, 4, 11, 14, 14, 11, 4, 1;
1, 4, 16, 15, 29, 15, 16, 4, 1;
...
		

Crossrefs

Cf. A056854, A065941, A000012, A131269.

Formula

A046854 + A065941 - A000012 as infinite lower triangular matrices.