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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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2
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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; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| 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 (paoloplava(AT)gmail.com), Jul 03 2008
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CROSSREFS
| Sequence in context: A202541 A070676 A068451 * A200165 A021810 A073800
Adjacent sequences: A131712 A131713 A131714 * A131716 A131717 A131718
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KEYWORD
| sign,easy
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Sep 14 2007
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EXTENSIONS
| Definition corrected by Paolo P. Lava (paoloplava(AT)gmail.com), Jul 03 2008
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