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Search: id:A132798
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A132798 Period 6: repeat 0, 2, 1, 0, -2, -1. +0
1
0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1, 0, 2, 1, 0, -2, -1 (list; graph; listen)
OFFSET

0,2

FORMULA

O.g.f.: x*(2+x)/((x+1)*(x^2-x+1)) = (1/3)*(4*x+1)/(x^2-x+1)-(1/3)/(x+1) . R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 28 2007

a(n)=(1/6)*{-(n mod 6)-[(n+1) mod 6]+2*[(n+2) mod 6]+[(n+3) mod 6]+[(n+4) mod 6]-2*[(n+5) mod 6]} - Paolo P. Lava (ppl(AT)spl.at), Nov 30 2007

CROSSREFS

Cf. A129339.

Sequence in context: A137269 A112201 A112203 this_sequence A080425 A048141 A025664

Adjacent sequences: A132795 A132796 A132797 this_sequence A132799 A132800 A132801

KEYWORD

sign

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Nov 21 2007

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.


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