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A143446 Triangle read by rows, A000012 * A143424, 1<=k<=n. 1
1, 0, 2, -1, 2, 4, -1, 0, 4, 8, -2, 0, 4, 8, 16, -1, -2, 0, 8, 16, 32, -2, -2, 0, 8, 16, 32, 64, -2, -2, 0, 0, 16, 32, 64, 128, -1, -2, -4, 0, 16, 32, 64, 128, 256, -1, -4, -4, 0, 0, 32, 64, 128, 256, 512 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row sums = A085945: (1, 2, 5, 11, 26, 53, 116,...).

LINKS

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

FORMULA

Triangle read by rows, A000012 * A143424, 1<=k<=n, where the operation A000012 * A143424 takes partial sums by column terms.

EXAMPLE

First few rows of the triangle =

1;

0, 2;

-1, 2, 4;

-1, 0, 4, 8;

-2, 0, 4, 8, 16;

-1, -2, 0, 8, 16, 32;

-2, -2, 0, 8, 16, 32, 64;

...

CROSSREFS

Cf. A143424, A085945.

Sequence in context: A007461 A181302 A304785 * A110330 A132014 A097864

Adjacent sequences:  A143443 A143444 A143445 * A143447 A143448 A143449

KEYWORD

tabl,sign

AUTHOR

Gary W. Adamson, Aug 15 2008

STATUS

approved

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Last modified May 9 00:09 EDT 2021. Contains 343685 sequences. (Running on oeis4.)