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A159286
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Expansion of (x-1)^2/(1-x^2-2*x^3)
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4
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1, -2, 2, 0, -2, 4, -2, 0, 6, -4, 6, 8, -2, 20, 14, 16, 54, 44, 86, 152, 174, 324, 478, 672, 1126, 1628, 2470, 3880, 5726, 8820, 13486, 20272, 31126, 47244, 71670, 109496, 166158, 252836, 385150, 585152
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| A floretion-generated sequence: 'i + 0.5('ij' + 'ik' + 'ji' + 'jk' + 'ki' + 'kj')
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LINKS
| Creighton Dement, Online Floretion Multiplier
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FORMULA
| a(n)=A159288(n)-3*A159287(n+1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 10 2009]
a(1)=1, a(2)=-2, a(3)=2, a(n)=1*a(n-2)+2*a(n-3) for n>=3. [From Harvey P. Dale, Apr 24 2011]
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MATHEMATICA
| CoefficientList[Series[(x-1)^2/(1-x^2-2*x^3), {x, 0, 40}], x] (* or *) LinearRecurrence[{0, 1, 2}, {1, -2, 2}, 40] (* From Harvey P. Dale, Apr 24 2011 *)
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CROSSREFS
| A159284, A159285, A159287, A159288
Sequence in context: A171933 A074823 A159916 * A006462 A008281 A094671
Adjacent sequences: A159283 A159284 A159285 * A159287 A159288 A159289
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KEYWORD
| easy,sign
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AUTHOR
| Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Apr 08 2009
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