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

1,1

Comments

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

Links

Table of n, a(n) for n=1..55.

Formula

A054521 * A128407 as infinite lower triangular matrices.

Example

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.

Sequence in context: A143242 A136442 A168030 * A290452 A215200 A054521

Adjacent sequences: A128428 A128429 A128430 * A128432 A128433 A128434

Keyword

tabl,sign

Author

Gary W. Adamson, Mar 03 2007

Status

approved