A131350 2*A007318 - A049310 as infinite lower triangular matrices.

1, 2, 1, 1, 4, 1, 2, 4, 6, 1, 1, 8, 9, 8, 1, 2, 7, 20, 16, 10, 1, 1, 12, 24, 40, 25, 12, 1, 2, 10, 42, 60, 70, 36, 14, 1, 1, 16, 46, 112, 125, 112, 49, 16, 1, 2, 13, 72, 148, 252, 231, 168, 64, 18, 1

Offset: 0

Author

Gary W. Adamson, Jul 02 2007

Keywords

• nonn
• tabl

Comments

Row sums = A099036 starting (1, 3, 6, 13, 27, 56, 115,...).

Examples

			First few rows of the triangle are:
1;
2, 1;
1, 4, 1;
2, 4, 6, 1;
1, 8, 9, 8, 1;
2, 7, 20, 16, 10, 1;
1, 12, 24, 40, 25, 12, 1;
...
		

Crossrefs

Cf. A007318, A049310, A131350.