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A084103 Expansion of (1+x)^3/(1+x^3). +0
3
1, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3, 0, 3, 3, 0, -3, -3 (list; graph; listen)
OFFSET

0,2

COMMENT

Partial sums are A084104.

FORMULA

a(n)=sum{k=0..n, binomial(2n-k-1, k)(-1)^k*3(n-k)} - Paul Barry (pbarry(AT)wit.ie), Jan 21 2005

CROSSREFS

Adjacent sequences: A084100 A084101 A084102 this_sequence A084104 A084105 A084106

Sequence in context: A098316 A160165 A084055 this_sequence A036477 A128164 A140686

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), May 15 2003

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.


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