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Search: id:A135694
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| A135694 |
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Period 6: repeat 1, -1, -1, -1, 0, 2 . |
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1
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| 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2, 1, -1, -1, -1, 0, 2
(list; graph; listen)
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OFFSET
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0,6
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FORMULA
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a(n)=(1/6)*{(n mod 6)-2*[(n+1) mod 6]-[(n+2) mod 6]+2*[(n+5) mod 6]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Mar 03 2008
a(n)=a(n-6) = -a(n-2)-a(n-4) . a(n) = [A119910(n+3)-A049347(n+1)]/2 for n>0. O.g.f.: -(2*x^3+x-1)/[(x^2-x+1)(x^2+x+1)]. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 31 2008
a(n)=(1/6)*{(n mod 6)-2*[(n+1) mod 6]-[(n+2) mod 6]+2*[(n+5) mod 6]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Mar 20 2008
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CROSSREFS
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Cf. A000079, A135575.
Sequence in context: A033264 A080234 A136049 this_sequence A025924 A025904 A137993
Adjacent sequences: A135691 A135692 A135693 this_sequence A135695 A135696 A135697
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KEYWORD
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sign,easy,more
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Feb 24 2008
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