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27, 54, 108, 216, 432, 864, 1728, 3456, 6912, 13824, 27648, 55296, 110592, 221184, 442368, 884736, 1769472, 3538944, 7077888, 14155776, 28311552, 56623104, 113246208, 226492416, 452984832, 905969664, 1811939328, 3623878656, 7247757312, 14495514624, 28991029248
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OFFSET
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0,1
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COMMENTS
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The squares of these terms appear in A159274.
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (2).
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FORMULA
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G.f.: 27/(1-2*x).
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MATHEMATICA
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Table[27 2^n, {n, 0, 40}] (* Vincenzo Librandi, Sep 30 2013 *)
NestList[2#&, 27, 30] (* Harvey P. Dale, Apr 17 2022 *)
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PROG
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(Magma)[27*2^n: n in [0..40]];
(PARI) apply(n -> 27*2^n, [0..40]) \\ Satish Bysany, Mar 06 2017
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CROSSREFS
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Cf. A000290, A159274.
Sequence in context: A306824 A043323 A033903 * A232922 A306761 A181874
Adjacent sequences: A175803 A175804 A175805 * A175807 A175808 A175809
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KEYWORD
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nonn,easy
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AUTHOR
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Vincenzo Librandi, Dec 05 2010
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STATUS
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approved
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