A130055 A129691 * A127093.

1, 0, 2, -1, 0, 3, -1, 0, 0, 4, -3, 0, 0, 0, 5, 0, -2, 0, 0, 0, 6, -5, 0, 0, 0, 0, 0, 7, -2, -2, 0, 0, 0, 0, 0, 8, -3, 0, -3, 0, 0, 0, 0, 0, 9, 0, -6, 0, 0, 0, 0, 0, 0, 0, 10

Offset

1,3

Comments

Row sums = d(n), A000005: (1, 2, 2, 3, 2, 4, 2, 4, 3, 4, ...). Left column = A130054: (1, 0, -1, -1, -3, 0, -5, -2, -3, 0, ...).

Links

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

Formula

A129691 * A127093 as infinite lower triangular matrices.

Example

First few rows of the triangle:
   1;
   0,  2;
  -1,  0,  3;
  -1,  0,  0,  4;
  -3,  0,  0,  0,  5;
   0, -2,  0,  0,  0,  6;
  -5,  0,  0,  0,  0,  0,  7;
  ...

Crossrefs

Cf. A129691, A127093, A000005, A130054.

Sequence in context: A082754 A063173 A120111 * A202452 A376789 A127013

Adjacent sequences: A130052 A130053 A130054 * A130056 A130057 A130058

Keyword

tabl,sign

Author

Gary W. Adamson, May 04 2007

Status

approved