A140581 Triangle read by rows, A054525 * A140256.

1, 1, 1, 2, 0, 1, 0, 1, 0, 1, 4, 0, 0, 0, 1, -3, 2, 1, 0, 0, 1, 6, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 2, 0, 0, 0, 0, 0, 1, -5, 4, 0, 0, 1, 0, 0, 0, 0, 1, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, -3, 0, 20, 1, 0, 0, 0, 0, 0, 1, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -7, 6, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1

Offset

1,4

Comments

Row sums = A014963: (1, 2, 3, 2, 5, 1, 7, 2, 3, 1, 11, 1, 13, 1,...).

Links

Table of n, a(n) for n=1..104.

Formula

Mobius transform of triangle A140256 = A054525 * A140256; as infinite lower triangular matrices.

Example

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

Crossrefs

Cf. A140256, A054525.

Sequence in context: A137276 A287234 A309938 * A137277 A039975 A358679

Adjacent sequences: A140578 A140579 A140580 * A140582 A140583 A140584

Keyword

tabl,sign

Author

Gary W. Adamson and Mats Granvik, May 17 2008

Status

approved