A115452 A Fredholm-Rueppel related triangle.

1, 2, -1, 2, -3, 1, 2, -3, 3, -1, 0, 0, 2, -3, 1, -2, 3, -1, -2, 3, -1, 0, 0, 0, 0, 2, -3, 1, 2, -3, 3, -1, 0, -2, 3, -1, 0, 0, 0, 0, 0, 0, 2, -3, 1, 0, 0, -2, 3, -1, 0, 0, -2, 3, -1, 0, 0, 0, 0, 0, 0, 0, 0, 2, -3, 1, -2, 3, -1, -2, 3, -1, 0, 0, 0, -2, 3, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, -3, 1

Offset: 0

Author

Paul Barry, Jan 22 2006

Keywords

• sign
• tabl

Comments

Inverse of A115450. Row sums are Fredholm-Rueppel sequence A036987.

Examples

			Triangle begins
1,
2, -1,
2, -3, 1,
2, -3, 3, -1,
0, 0, 2, -3, 1,
-2, 3, -1, -2, 3, -1,
0, 0, 0, 0, 2, -3, 1,
2, -3, 3, -1, 0, -2, 3, -1,
0, 0, 0, 0, 0, 0, 2, -3, 1,
0, 0, -2, 3, -1, 0, 0, -2, 3, -1,
0, 0, 0, 0, 0, 0, 0, 0, 2, -3, 1,
-2, 3, -1, -2, 3, -1, 0, 0, 0, -2, 3, -1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, -3, 1
		

Formula

Inverse of (1/((1-x)(1-2x)), -x)-(x/((1-x)(1-2x)), -x^2) (expressed in the notation of Riordan arrays).