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A117941 Inverse of number triangle A117939. 3
1, -2, 1, -5, 2, 1, -2, 0, 0, 1, 4, -2, 0, -2, 1, 10, -4, -2, -5, 2, 1, -5, 0, 0, 2, 0, 0, 1, 10, -5, 0, -4, 2, 0, -2, 1, 25, -10, -5, -10, 4, 2, -5, 2, 1, -2, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 4, -2, 0, 0, 0, 0, 0, 0, 0, -2, 1, 10, -4, -2, 0, 0, 0, 0, 0, 0, -5, 2, 1, 4, 0, 0, -2, 0, 0, 0, 0, 0, -2, 0, 0, 1, -8, 4, 0, 4, -2, 0, 0, 0, 0, 4, -2, 0, -2, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Row sums are A117942. A117941 mod 2=A117944.

LINKS

Table of n, a(n) for n=0..105.

EXAMPLE

Triangle begins

1,

-2, 1,

-5, 2, 1,

-2, 0, 0, 1,

4, -2, 0, -2, 1,

10, -4, -2, -5, 2, 1,

-5, 0, 0, 2, 0, 0, 1,

10, -5, 0, -4, 2, 0, -2, 1,

25, -10, -5, -10, 4, 2, -5, 2, 1

CROSSREFS

Sequence in context: A140879 A006556 A108790 * A134566 A128694 A088421

Adjacent sequences:  A117938 A117939 A117940 * A117942 A117943 A117944

KEYWORD

sign,tabl

AUTHOR

Paul Barry, Apr 05 2006

STATUS

approved

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Last modified February 25 14:46 EST 2018. Contains 299654 sequences. (Running on oeis4.)