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A104976 Row sums of a Fredholm-Rueppel inverse triangle. +0
2
1, 1, 0, 0, 1, 1, -1, -1, 2, 2, -2, -2, 4, 4, -6, -6, 9, 9, -13, -13, 21, 21, -31, -31, 47, 47, -71, -71, 109, 109, -165, -165, 250, 250, -380, -380, 578, 578, -876, -876, 1330, 1330, -2020, -2020, 3068, 3068, 4656, -4656, 7070, 7070, -10736, -10736, 16300, 16300, -24746, -24746, 37574, 37574, -57050, -57050 (list; graph; listen)
OFFSET

0,9

COMMENT

Row sums of A104975.

FORMULA

G.f. : x^2/(sum{k>=0, x^(2^k)}-x)/(1-x)

CROSSREFS

Sequence in context: A104409 A032576 A071809 this_sequence A010334 A010578 A005866

Adjacent sequences: A104973 A104974 A104975 this_sequence A104977 A104978 A104979

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 30 2005

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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