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A131201
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Period 24: repeat 0,1,2,5,2,9,0,9,8,5,8,1,0,-1,-2,-5,-2,-9,0,-9,-8,-5,-8,-1.
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1
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0, 1, 2, 5, 2, 9, 0, 9, 8, 5, 8, 1, 0, -1, -2, -5, -2, -9, 0, -9, -8, -5, -8, -1, 0, 1, 2, 5, 2, 9, 0, 9, 8, 5, 8, 1, 0, -1, -2, -5, -2, -9, 0, -9, -8, -5, -8, -1, 0, 1, 2, 5, 2, 9, 0, 9, 8, 5, 8, 1, 0, -1, -2, -5, -2, -9, 0, -9, -8, -5, -8, -1, 0, 1, 2, 5, 2, 9, 0, 9, 8, 5, 8, 1, 0, -1, -2, -5, -2, -9, 0, -9, -8, -5, -8, -1, 0, 1, 2, 5, 2, 9, 0, 9, 8
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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FORMULA
| O.g.f.: x(x^2+1)(x^8+8x^7+4x^6+5x^4+4x^2+2x+1)/((x^4+1)(x^8-x^4+1)) . Also a(n)=b(n-2)+b(n), n>=2, where b(n) = 1, 2, 4, 0, 5, 0, 4, 8, 1, 0, 0, 0, -1, -2, -4, 0, -5, 0, -4, -8, -1, 0, 0, 0, extended with period 24. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 15 2008
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CROSSREFS
| Sequence in context: A029621 A134349 A131711 * A070633 A119764 A178310
Adjacent sequences: A131198 A131199 A131200 * A131202 A131203 A131204
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KEYWORD
| sign,easy
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Sep 26 2007
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