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A140581 Triangle read by rows, A054525 * A140256. 3
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 (list; table; graph; refs; listen; history; text; internal format)
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 A016253

Adjacent sequences: A140578 A140579 A140580 * A140582 A140583 A140584

KEYWORD

tabl,sign

AUTHOR

Gary W. Adamson and Mats Granvik, May 17 2008

STATUS

approved

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Last modified December 5 19:57 EST 2022. Contains 358588 sequences. (Running on oeis4.)