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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 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Row sums are A122918. Inverse is A122919.

LINKS

Table of n, a(n) for n=0..51.

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

Adjacent sequences:  A122914 A122915 A122916 * A122918 A122919 A122920

KEYWORD

easy,sign,tabl

AUTHOR

Paul Barry, Sep 19 2006

STATUS

approved

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Last modified April 9 12:13 EDT 2020. Contains 333348 sequences. (Running on oeis4.)