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Search: id:A005009
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| 7, 14, 28, 56, 112, 224, 448, 896, 1792, 3584, 7168, 14336, 28672, 57344, 114688, 229376, 458752, 917504, 1835008, 3670016, 7340032, 14680064, 29360128, 58720256, 117440512, 234881024, 469762048, 939524096, 1879048192, 3758096384
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OFFSET
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0,1
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COMMENT
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An autocopy sequence: its first differences are the sequence itself. - Alexandre Wajnberg & Eric Angelini (alexandre.wajnberg(AT)ulb.ac.be), Sep 07 2005
7 times powers of 2. [From Omar E. Pol (info(AT)polprimos.com), Dec 16 2008]
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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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G.f.: 7/(1-2*x).
a(n) = A118416(n+1,4) for n>3. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Apr 27 2006
a(n)=2*a(n-1), n>0 ; a(0)=7 . [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 23 2008]
a(n) = A000079(n)*7. [From Omar E. Pol (info(AT)polprimos.com), Dec 16 2008]
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MAPLE
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with(finance):seq(futurevalue(7, 1, n), n=0..29); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 24 2009]
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CROSSREFS
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Row sums of (6, 1)-Pascal triangle A093563 and of (1, 6)-Pascal triangle A096956, n>=1.
Cf. A000079. [From Omar E. Pol (info(AT)polprimos.com), Dec 16 2008]
Sequence in context: A071711 A033895 A115876 this_sequence A135092 A058530 A134384
Adjacent sequences: A005006 A005007 A005008 this_sequence A005010 A005011 A005012
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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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EXTENSIONS
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More terms from Omar E. Pol (info(AT)polprimos.com), Dec 16 2008
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