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Search: id:A005015
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| 11, 22, 44, 88, 176, 352, 704, 1408, 2816, 5632, 11264, 22528, 45056, 90112, 180224, 360448, 720896, 1441792, 2883584, 5767168, 11534336, 23068672, 46137344, 92274688, 184549376, 369098752, 738197504
(list; graph; listen)
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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
11 times powers of 2. [From Omar E. Pol (info(AT)polprimos.com), Dec 16 2008]
A144472=-1,2,9,13,31,57,. a(n)=A144472(n+1)+A144472(n+2).Also a(n)=A144472(n+3)-A144472(n+1). A144472(n+1) is a Jacobsthal sequence from 2 and 9: A144472(n+3)=A144472(n+2)+2*A144472(n+1). Note a(n) mod 9=period 6:repeat 2,4,8,7,5,1=A153130(n+1). [From Paul Curtz (bpcrtz(AT)free.fr), Jan 06 2009]
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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.: 11/(1-2*x).
a(n)=2*a(n-1), n>0 ; a(0)=11 . [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 23 2008]
a(n) = A000079(n)*11. [From Omar E. Pol (info(AT)polprimos.com), Dec 16 2008]
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MAPLE
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with(finance):seq(futurevalue(11, 1, n), n=0..26); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 24 2009]
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CROSSREFS
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Row sums of (10, 1)-Pascal triangle A093645.
Cf. A000079. [From Omar E. Pol (info(AT)polprimos.com), Dec 16 2008]
Sequence in context: A026037 A122613 A115768 this_sequence A070069 A109687 A111696
Adjacent sequences: A005012 A005013 A005014 this_sequence A005016 A005017 A005018
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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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