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Search: id:A132723
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| 3, 4, 4, 0, -8, -16, -16, 0, 32, 64, 64, 0, -128, -256, -256, 0, 512, 1024, 1024, 0, -2048, -4096, -4096, 0, 8192, 16384, 16384, 0, -32768, -65536, -65536, 0, 131072, 262144, 262144, 0, -524288, -1048576, -1048576
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OFFSET
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0,1
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FORMULA
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a(n)=4a(n-1)-6a(n-2)+4a(n-3), n positive. For a(0)=3,a(1)=a(2)=4,a(3)=0.
Sequence is identical to its fourth differences.
O.g.f.: 1+2/(2*x^2-2*x+1). a(n)=2*a(n-1)-2*a(n-2) if n>2. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 02 2008
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CROSSREFS
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Adjacent sequences: A132720 A132721 A132722 this_sequence A132724 A132725 A132726
Sequence in context: A038018 A108658 A021748 this_sequence A057279 A054733 A120649
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KEYWORD
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sign
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Nov 16 2007
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 02 2008
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