A017929 Powers of sqrt(8) rounded to nearest integer.

1, 3, 8, 23, 64, 181, 512, 1448, 4096, 11585, 32768, 92682, 262144, 741455, 2097152, 5931642, 16777216, 47453133, 134217728, 379625062, 1073741824, 3037000500, 8589934592, 24296004000, 68719476736

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..2000

Formula

a(n) = A017911(3n). - R. J. Mathar, Apr 28 2008

Mathematica

Floor[(Sqrt[8]^Range[0, 40]+1/2)] (* Vincenzo Librandi, Nov 19 2011 *)

Prog

(PARI) a(n)=round(sqrt(8)^n) \\ Charles R Greathouse IV, Nov 18 2011
(Magma) [Round(Sqrt(8)^n): n in [0..40]]; // Vincenzo Librandi, Nov 19 2011

Crossrefs

Sequence in context: A147484 A316980 A331321 * A017930 A305561 A014398

Adjacent sequences: A017926 A017927 A017928 * A017930 A017931 A017932

Keyword

nonn

Author

N. J. A. Sloane

Status

approved