A017914 Powers of sqrt(3) rounded to nearest integer.

1, 2, 3, 5, 9, 16, 27, 47, 81, 140, 243, 421, 729, 1263, 2187, 3788, 6561, 11364, 19683, 34092, 59049, 102276, 177147, 306828, 531441, 920483, 1594323, 2761448, 4782969, 8284345, 14348907, 24853036, 43046721, 74559108, 129140163, 223677324, 387420489, 671031971, 1162261467

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..4000

Kival Ngaokrajang, Illustration for initial terms

Formula

a(2n) = 3^n = A000244(n).

Mathematica

Floor[(Sqrt[3]^Range[0, 40]+1/2)] (* Vincenzo Librandi, Nov 19 2011 *)

Prog

(PARI) a(n)=round(sqrt(3)^n) \\ Charles R Greathouse IV, Nov 18 2011
(Magma) [Round(Sqrt(3)^n): n in [0..40]]; // Vincenzo Librandi, Nov 19 2011

Crossrefs

Cf. A000244.

Sequence in context: A011826 A119968 A291311 * A137402 A134009 A018160

Adjacent sequences: A017911 A017912 A017913 * A017915 A017916 A017917

Keyword

nonn

Author

N. J. A. Sloane

Status

approved