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Search: id:A133494
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| 1, 1, 3, 9, 27, 81, 243, 729, 2187, 6561, 19683, 59049, 177147, 531441, 1594323, 4782969, 14348907, 43046721, 129140163, 387420489, 1162261467, 3486784401, 10460353203, 31381059609, 94143178827, 282429536481, 847288609443
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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Binomial transform of A078008. - Paul Curtz (bpcrtz(AT)free.fr), Aug 04 2008
G.f.: (1-2x)/(1-3x). a(n)=A000244(n+1), n>0. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 11 2008
a(n)=Sum_{k, 0<=k<=n}A112467(n,k)*2^k = Sum_{k, 0<=k<=n}A071919(n,k)*2^k. [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 13 2008]
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MAPLE
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with(finance):seq(ceil(futurevalue(3, 2, n)), n=-2..24); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 25 2009]
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CROSSREFS
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Sequence in context: A080557 A022014 A038002 this_sequence A140429 A141413 A000244
Adjacent sequences: A133491 A133492 A133493 this_sequence A133495 A133496 A133497
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KEYWORD
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nonn
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AUTHOR
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Paul Barry, Paul Curtz (pbarry(AT)wit.iebpcrtz(AT)free.fr), Dec 23 2007
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EXTENSIONS
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Definition clarified by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 11 2008
Added more terms. Mohammad K. Azarian (azarian(AT)evansville.edu), Dec 23 2008
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