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Search: id:A131289
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| A131289 |
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Period 12: repeat 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1. |
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+0
11
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| 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1, 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1, 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1, 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1, 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1, 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1, 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1, 1, 1, 3, -3, -3, 1, -1, -1, -3, 3, 3, -1, 1, 1, 3, -3, -3, 1
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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a(n)=(1/6)*{-(n mod 12)+2*[(n+1) mod 12]-3*[(n+3) mod 12]+[(n+4) mod 12]+[(n+6) mod 12]-2*[(n+7) mod 12]+3*[(n+9) mod 12]-[(n+10) mod 12]}, with n>=0. - Paolo P. Lava (ppl(AT)spl.at), Oct 08 2007
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CROSSREFS
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Cf. A130974 (1, 1, 1, 3, 3, 3)
Sequence in context: A110566 A126066 A130974 this_sequence A064353 A080311 A135368
Adjacent sequences: A131286 A131287 A131288 this_sequence A131290 A131291 A131292
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KEYWORD
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sign,easy
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Sep 29 2007
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EXTENSIONS
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More terms from Olaf Voss (richyfourtythree(AT)yahoo.com), Feb 11 2008
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