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A142971 Triangle read by rows: A061397 with negative signs interleaved with (k-1) zeros. 2
0, -2, 0, -3, 0, 0, 0, -2, 0, 0, -5, 0, 0, 0, 0, 0, -3, -2, 0, 0, 0, -7, 0, 0, 0, 0, 0, 0, 0, 0, 0, -2, 0, 0, 0, 0, 0, 0, -3, 0, 0, 0, 0, 0, 0, 0, -5, 0, 0, -2, 0, 0, 0, 0, 0, -11, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -3, 0, -2, 0, 0, 0, 0, 0, 0, -13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -7, 0, 0, 0, 0, -2, 0, 0, 0, 0, 0, 0, 0, 0, 0, -5, 0, -3, 0, 0, 0, 0, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Except for the first term, row products are given by A062953.

LINKS

Table of n, a(n) for n=1..117.

EXAMPLE

Table begins:

0;

-2, 0;

-3, 0, 0;

0,-2, 0, 0;

-5, 0, 0, 0, 0;

0,-3,-2, 0, 0, 0;

-7, 0, 0, 0, 0, 0, 0;

0, 0, 0,-2, 0, 0, 0, 0;

0, 0,-3, 0, 0, 0, 0, 0, 0;

PROG

(Excel) =if(mod(row(); column())=0; lookup(row()/column(); A000027; -A061397); "")

CROSSREFS

Cf. A061397, A062953, A008472.

Sequence in context: A079302 A138806 A181105 * A104117 A114511 A085199

Adjacent sequences:  A142968 A142969 A142970 * A142972 A142973 A142974

KEYWORD

sign,tabl

AUTHOR

Mats O. Granvik and Gary W. Adamson, Jul 14 2008

STATUS

approved

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Last modified May 22 18:53 EDT 2019. Contains 323481 sequences. (Running on oeis4.)