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Search: id:A084244
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A084244 a(0)=1,a(1)=5,a(n)=-3a(n-1), n>1. +0
1
1, 5, -15, 45, -135, 405, -1215, 3645, -10935, 32805, -98415, 295245, -885735, 2657205, -7971615, 23914845, -71744535, 215233605, -645700815, 1937102445, -5811307335, 17433922005, -52301766015, 156905298045, -470715894135, 1412147682405, -4236443047215 (list; graph; listen)
OFFSET

0,2

COMMENT

Binomial transform is A083581.

FORMULA

a(n)=8*0^n/3-5(-3)^n/3; G.f.: (1+8x)/(1+3x); E.g.f.: (8exp(0)-5exp(-3x))/3.

CROSSREFS

Sequence in context: A000334 A000335 A005030 this_sequence A099235 A035069 A001869

Adjacent sequences: A084241 A084242 A084243 this_sequence A084245 A084246 A084247

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), May 23 2003

page 1

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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