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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
OFFSET
1,2
COMMENTS
Except for the first term, row products are given by A062953.
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
KEYWORD
sign,tabl
AUTHOR
Mats O. Granvik and Gary W. Adamson, Jul 14 2008
STATUS
approved