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Search: id:A104977
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A104977 Defining sequence for an inverse Fredholm-Rueppel triangle. +0
2
1, -1, 1, -2, 3, -4, 6, -10, 15, -22, 34, -52, 78, -118, 180, -274, 415, -630, 958, -1454, 2206, -3350, 5088, -7724, 11726, -17806, 27036, -41046, 62320, -94624 (list; graph; listen)
OFFSET

0,4

COMMENT

A104975 is the sequence array for this sequence.

FORMULA

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

CROSSREFS

Sequence in context: A086990 A090412 A073028 this_sequence A018062 A070542 A098855

Adjacent sequences: A104974 A104975 A104976 this_sequence A104978 A104979 A104980

KEYWORD

easy,sign

AUTHOR

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

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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