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2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0, 2, 4, 6, 8, 1, 3, 5, 7, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| A periodic double sawtooth pattern of positive even and odd numbers.
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FORMULA
| a(n) = A131669(n+2)-1.
Period length 9: a(n+9)=a(n).
a(n)=(1/9)*{-(n mod 9)+8*[(n+1) mod 9]-[(n+2) mod 9]-[(n+3) mod 9]-[(n+4) mod 9]+8*[(n+5) mod 9]-[(n+6) mod 9]-[(n+7) mod 9]-[(n+8) mod 9]}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Nov 06 2008]
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CROSSREFS
| Sequence in context: A036211 A127353 A032763 * A169909 A180592 A004092
Adjacent sequences: A146079 A146080 A146081 * A146083 A146084 A146085
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KEYWORD
| nonn
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Oct 27 2008
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EXTENSIONS
| Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 08 2008
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