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A164611 Expansion of (1 + x + 2x^2 - x^3)/(1 - 2x + 3x^2 - 2x^3 + x^4). 1
1, 3, 5, 2, -6, -11, -5, 9, 17, 8, -12, -23, -11, 15, 29, 14, -18, -35, -17, 21, 41, 20, -24, -47, -23, 27, 53, 26, -30, -59, -29, 33, 65, 32, -36, -71, -35, 39, 77, 38, -42, -83, -41, 45, 89, 44, -48, -95, -47, 51, 101 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

Hankel transform of A113682.

FORMULA

G.f.: (1+x+2x^2-x^3)/(1-x+x^2)^2.

CROSSREFS

Sequence in context: A139584 A064790 A113966 * A182813 A073897 A097465

Adjacent sequences:  A164608 A164609 A164610 * A164612 A164613 A164614

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Aug 17 2009

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Last modified February 14 20:38 EST 2012. Contains 205663 sequences.