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 A094386 a(n) = floor(sqrt(3)*2^(n-1)). 6
 1, 3, 6, 13, 27, 55, 110, 221, 443, 886, 1773, 3547, 7094, 14188, 28377, 56755, 113511, 227023, 454046, 908093, 1816186, 3632373, 7264747, 14529495, 29058990, 58117981, 116235962, 232471924, 464943848, 929887696, 1859775393, 3719550786 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 FORMULA a(n) = A022838(2^(n-1)). - R. J. Mathar, Oct 22 2011 MATHEMATICA Table[Floor[Sqrt[3] 2^(n-1)], {n, 40}] (* Vincenzo Librandi, Sep 20 2017 *) PROG (MAGMA) [Floor(2^(n-1)*Sqrt(3)): n in [1..40]]; // Vincenzo Librandi, Sep 20 2017 (PARI) a(n) = floor(sqrt(3)*2^(n-1)); \\ Michel Marcus, Sep 20 2017 CROSSREFS Sequence in context: A065830 A055143 A092539 * A267604 A099036 A131246 Adjacent sequences:  A094383 A094384 A094385 * A094387 A094388 A094389 KEYWORD nonn AUTHOR Roger L. Bagula, Jun 03 2004 STATUS approved

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Last modified February 25 20:52 EST 2020. Contains 332258 sequences. (Running on oeis4.)