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A157128 Expansion of (1-x-x^2+x^3-x^5)/(1+2x^3+x^6). 1
1, -1, -1, -1, 2, 1, 1, -3, -1, -1, 4, 1, 1, -5, -1, -1, 6, 1, 1, -7, -1, -1, 8, 1, 1, -9, -1, -1, 10, 1, 1, -11, -1, -1, 12, 1, 1, -13, -1, -1, 14, 1, 1, -15, -1, -1, 16, 1, 1, -17, -1, -1, 18, 1, 1, -19, -1, -1, 20, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Hankel transform of A157127.

LINKS

Table of n, a(n) for n=0..60.

CROSSREFS

Sequence in context: A181846 A210873 A030272 * A217667 A194086 A164659

Adjacent sequences:  A157125 A157126 A157127 * A157129 A157130 A157131

KEYWORD

easy,sign

AUTHOR

Paul Barry, Feb 23 2009

STATUS

approved

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Last modified May 26 04:23 EDT 2013. Contains 225653 sequences.