A128431 Triangle read by rows: A054521 * A128407.

1, 1, 0, 1, -1, 0, 1, 0, -1, 0, 1, -1, -1, 0, 0, 1, 0, 0, 0, -1, 0, 1, -1, -1, 0, -1, 1, 0, 1, 0, -1, 0, -1, 0, -1, 0, 1, -1, 0, 0, -1, 0, -1, 0, 0, 1, 0, -1, 0, 0, 0, -1, 0, 0, 0

Offset: 1

Author

Gary W. Adamson, Mar 03 2007

Keywords

• tabl
• sign

Comments

Row sums = A112399: (1, 1, 0, 0, -1, 0, -1, -2, -2, -1, ...).

Examples

			First few rows of the triangle:
  1;
  1,  0;
  1, -1,  0;
  1,  0, -1,  0;
  1, -1, -1,  0,  0;
  1,  0,  0,  0, -1,  0;
  1, -1, -1,  0, -1,  1,  0;
		

Crossrefs

Cf. A054521, A128407, A112399, A008683.

Formula

A054521 * A128407 as infinite lower triangular matrices.