A131777 5*A065941 - 4*A049310.

1, 5, 1, 1, 5, 1, 5, -3, 10, 1, 1, 5, 3, 10, 1, 5, -7, 20, -1, 15, 1, 1, 5, 1, 20, 10, 15, 1, 5, -11, 30, -15, 50, 6, 20, 1, 1, 5, -5, 30, 15, 50, 22, 20, 1, 5, -15, 40, -45, 105, -9, 100, 18, 25, 1

Offset: 1

Author

Gary W. Adamson, Jul 14 2007

Keywords

• tabl
• sign

Comments

Row sums = A022096(n-1).

Examples

			First few rows of the triangle are:
1;
5, 1
1, 5, 1;
5, -3, 10, 1;
1, 5, 3, 10, 1;
5, -7, 20, -1, 15, 1;
1, 5, 1, 20, 10, 15, 1;
...
		

Crossrefs

Cf. A131774, A131775, A131776, A065941, A049310, A022096.

Formula

5*A065941 - 4*A049310 as infinite lower triangular matrices.

Extensions

Corrected A-number in row sums reference R. J. Mathar, Jun 16 2009