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A122917
Riordan array (1/(1+x+x^2),x/(1+x)^2).
2
1, -1, 1, 0, -3, 1, 1, 5, -5, 1, -1, -6, 14, -7, 1, 0, 6, -29, 27, -9, 1, 1, -6, 50, -76, 44, -11, 1, -1, 7, -77, 175, -155, 65, -13, 1, 0, -9, 111, -351, 441, -274, 90, -15, 1, 1, 11, -154, 638, -1078, 924, -441
OFFSET
0,5
COMMENTS
Row sums are A122918. Inverse is A122919.
EXAMPLE
Triangle begins
1,
-1, 1,
0, -3, 1,
1, 5, -5, 1,
-1, -6, 14, -7, 1,
0, 6, -29, 27, -9, 1,
1, -6, 50, -76, 44, -11, 1,
-1, 7, -77, 175, -155, 65, -13, 1
CROSSREFS
Sequence in context: A243576 A211314 A026703 * A211315 A096583 A130154
KEYWORD
easy,sign,tabl
AUTHOR
Paul Barry, Sep 19 2006
STATUS
approved