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A131257 A052509 * A000012(signed). 1
1, 0, 1, 0, 1, 1, -1, 2, 1, 1, 0, 1, 3, 1, 1, 0, 1, 4, 3, 1, 1, 1, 0, 6, 5, 3, 1, 1, 0, 1, 6, 10, 5, 3, 1, 1, 0, 1, 7, 15, 11, 5, 3, 1, 1, -1, 2, 7, 2, 20, 11, 5, 3, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,8

COMMENTS

Row sums = A009517: (1, 1, 2, 3, 6, 10, 17, 27, 44,...). A131256 = A000012(signed) * A052509.

LINKS

Table of n, a(n) for n=0..54.

FORMULA

A052509 * A000012(signed, + - + - by columns), as infinite lower triangular matrices.

EXAMPLE

First few rows of the triangle are:

1;

0, 1;

0, 1, 1;

-1, 2, 1, 1;

0, 1, 3, 1, 1;

0, 1, 4, 3, 1, 1;

1, 0, 6, 5, 3, 1, 1;

...

CROSSREFS

Cf. A052509, A000012, A131256, A009517.

Sequence in context: A322508 A194438 A144409 * A105806 A129501 A129353

Adjacent sequences:  A131254 A131255 A131256 * A131258 A131259 A131260

KEYWORD

tabl,sign

AUTHOR

Gary W. Adamson, Jun 23 2007

STATUS

approved

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Last modified May 14 03:51 EDT 2021. Contains 343872 sequences. (Running on oeis4.)