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Search: id:A002042
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| 7, 28, 112, 448, 1792, 7168, 28672, 114688, 458752, 1835008, 7340032, 29360128, 117440512, 469762048, 1879048192, 7516192768, 30064771072, 120259084288, 481036337152, 1924145348608, 7696581394432
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Subsequence of A000069, the odious numbers. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 26 2007
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LINKS
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Index entries for sequences related to linear recurrences with constant coefficients
Tanya Khovanova, Recursive Sequences
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FORMULA
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a(n)=4*a(n-1), n>0 ; a(0)=7 . G.f.: 7/(1-4*x). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 23 2008]
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MAPLE
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with(finance):seq(futurevalue(7, 3, n), n=0..20); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 25 2009]
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CROSSREFS
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First differences of A083597. Bisection of A005009.
Sequence in context: A000416 A000417 A026642 this_sequence A037597 A037702 A054626
Adjacent sequences: A002039 A002040 A002041 this_sequence A002043 A002044 A002045
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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