A128314 Triangle, A000012 * A128313.

1, -1, 1, -1, -1, 1, -1, 1, -2, 1, -1, -3, 4, -3, 1, -1, 3, -7, 7, -4, 1, -1, -3, 8, -13, 11, -5, 1, -1, 1, -10, 21, -24, 16, -6, 1, -1, -5, 17, -35, 46, -40, 22, -7, 1, -1, 7, -25, 53, -81, 86, -62, 29, -8, 1

Offset

1,9

Comments

Row sums = the Mertens sequence: A002321, (1, 0, -1, -1, -2, ...).

Links

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

Formula

A000012 * A128313 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
  -1,  1;
  -1, -1,  1;
  -1,  1, -2,   1
  -1, -3,  4,  -3,  1;
  -1,  3, -7,   7, -4,  1;
  -1, -3,  8, -13, 11, -5, 1;
  ...

Crossrefs

Cf. A128313, A000012, A002321.

Sequence in context: A336842 A159933 A305431 * A025564 A052265 A306565

Adjacent sequences: A128311 A128312 A128313 * A128315 A128316 A128317

Keyword

tabl,sign

Author

Gary W. Adamson, Feb 25 2007

Status

approved