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Search: id:A131715
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| A131715 |
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Period 12: repeat 0,2,4,0,-6,8,0,-2,-4,0,6,-8. |
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+0
3
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| 0, 2, 4, 0, -6, 8, 0, -2, -4, 0, 6, -8, 0, 2, 4, 0, -6, 8, 0, -2, -4, 0, 6, -8, 0, 2, 4, 0, -6, 8, 0, -2, -4, 0, 6, -8, 0, 2, 4, 0, -6, 8, 0, -2, -4, 0, 6, -8, 0, 2, 4, 0, -6, 8, 0, -2, -4, 0, 6, -8, 0, 2, 4, 0, -6, 8, 0, -2, -4, 0, 6, -8, 0, 2, 4, 0, -6, 8, 0, -2, -4, 0, 6, -8, 0, 2, 4, 0, -6, 8, 0, -2, -4, 0, 6, -8, 0, 2, 4, 0, -6, 8, 0, -2, -4
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n)=(1/6)*{-4*(n mod 12)+7*[(n+1) mod 12]-3*[(n+2) mod 12]-2*[(n+3) mod 12]+[(n+4) mod 12]+[(n+5) mod 12]+4*[(n+6) mod 12]-7*[(n+7) mod 12]+3*[(n+8) mod 12]+2*[(n+9) mod 12]-[(n+10) mod 12]-[(n+11) mod 12]}, with n>=0. - Paolo P. Lava (ppl(AT)spl.at), Jul 03 2008
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CROSSREFS
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Sequence in context: A002652 A070676 A068451 this_sequence A021810 A073800 A076813
Adjacent sequences: A131712 A131713 A131714 this_sequence A131716 A131717 A131718
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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 14 2007
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EXTENSIONS
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Definition corrected by Paolo P. Lava (ppl(AT)spl.at), Jul 03 2008
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