A161363 Inverse of the partition triangle A026794.

1, -1, 1, -2, 0, 1, -2, -1, 0, 1, -4, -1, 0, 0, 1, -3, -2, -1, 0, 0, 1, -7, -2, -1, 0, 0, 0, 1, -7, -3, -1, -1, 0, 0, 0, 1, -12, -3, -2, -1, 0, 0, 0, 0, 1, -13, -5, -2, -1, -1, 0, 0, 0, 0, 1, -22, -6, -3, -1, -1, 0, 0, 0, 0, 0, 1, -25, -7, -3, -2, -1, -1, 0, 0, 0, 0, 0, 1, -42, -9, -4, -2, -1, -1, 0, 0, 0, 0, 0, 0, 1

Offset: 1

Author

Gary W. Adamson, Jun 07 2009

Keywords

• tabl
• sign

Comments

Row sums = A161375. A modified version of this triangle = A161364.

Examples

			First few rows of the triangle =
1;
-1, 1;
-2, 0, 1;
-2, -1, 0, 1;
-4, -1, 0, 0, 1;
-3, -2, -1, 0, 0, 1;
-7, -2, -1, 0, 0, 0, 1;
-7, -3, -1, -1, 0, 0, 0, 1;
-12, -3, -2, -1, 0, 0, 0, 0, 1;
-13, -5, -2, -1, -1, 0, 0, 0, 0, 1;
-22, -6, -3, -1, -1, 0, 0, 0, 0, 0, 1;
...
		

Crossrefs

Cf. A000041, A026794, A161364, A161375.

Formula

Triangle read by rows, inverse of A026794.

Extensions

a(3) = 1 corrected and more terms from Georg Fischer, Jun 05 2023