A128432 Triangle read by rows: A128407 * A054521.

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

Offset

1,1

Comments

Row sums = A023900: (1, -1, -2, 0, -4, 2, -6, ...) Left border = mu(n), A008683.

Links

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

Formula

A128407 * A054521 as infinite lower triangular matrices.

Example

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

Crossrefs

Cf. A128407, A054521, A008683, A023900.

Sequence in context: A137161 A329677 A077050 * A195198 A039966 A089451

Adjacent sequences: A128429 A128430 A128431 * A128433 A128434 A128435

Keyword

tabl,sign

Author

Gary W. Adamson, Mar 03 2007

Status

approved