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Search: id:A134581
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| A134581 |
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a(n)=4a(n-1)-7a(n-2)+6a(n-3)-3a(n-4). |
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+0
2
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| 0, 1, 2, 3, 4, 4, 0, -13, -40, -81, -122, -122, 0, 365
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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a(n)=-(1/6)*I*{3/2+(1/2)*I*sqrt(3)}^n*sqrt(3)+(1/6)*I*sqrt(3)*{3/2-(1/2)*I*sqrt(3)}^n +(1/6)*I*{1/2-(1/2)*I*sqrt(3)}^n*sqrt(3)-(1/6*I*{1/2+(1/2)*I*sqrt(3)}^n*sqrt(3), with n>=0 and I=sqrt(-1) - Paolo P. Lava (ppl(AT)spl.at), Jun 09 2008
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CROSSREFS
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Adjacent sequences: A134578 A134579 A134580 this_sequence A134582 A134583 A134584
Sequence in context: A009492 A009810 A111362 this_sequence A099587 A014292 A066078
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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), Jan 23 2008
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