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Search: id:A133455
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| A133455 |
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a(n)=3a(n-1)-3a(n-2)+2a(n-3). |
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+0
1
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| 4, 2, 1, 5, 16, 35, 67, 128, 253, 509, 1024, 2051, 4099, 8192, 16381
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Sequence is identical to its third differences.
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FORMULA
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a(n)-2^n = hexaperiodic 3, 0, -3, -3, 0, 3.
O.g.f: -(4-10*x+7*x^2)/((2*x-1)*(x^2-x+1)). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 30 2007
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CROSSREFS
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Adjacent sequences: A133452 A133453 A133454 this_sequence A133456 A133457 A133458
Sequence in context: A136619 A132708 A016506 this_sequence A122606 A119953 A010645
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KEYWORD
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nonn
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Nov 27 2007
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