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A105367 Expansion of (1-x^3)/(1-x^5). 3
1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0, 0, -1, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
Periodic {1,0,0,-1,0}. Partial sums of A105368. Binomial transform of A105370.
LINKS
FORMULA
G.f.: (1+x+x^2)/(1+x+x^2+x^3+x^4);
a(n) = sqrt(2/5 - 2*sqrt(5)/25)*cos(4*Pi*n/5 + 3*Pi/10) + sqrt(2/5 + 2*sqrt(5)/25)*sin(2*Pi*n/5 + 2*Pi/5).
CROSSREFS
Sequence in context: A244612 A262805 A213728 * A232990 A285076 A338353
KEYWORD
easy,sign
AUTHOR
Paul Barry, Apr 01 2005
STATUS
approved

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Last modified June 21 07:35 EDT 2024. Contains 373540 sequences. (Running on oeis4.)