A017928 Powers of sqrt(8) rounded down.

1, 2, 8, 22, 64, 181, 512, 1448, 4096, 11585, 32768, 92681, 262144, 741455, 2097152, 5931641, 16777216, 47453132, 134217728, 379625062, 1073741824, 3037000499, 8589934592, 24296003999, 68719476736

Offset

0,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Formula

a(n) = A017910(3n). - R. J. Mathar, Apr 28 2008

Mathematica

Floor[(Sqrt[8])^Range[0, 40]] (* Harvey P. Dale, Jun 20 2011 *)

Prog

(PARI) a(n)=sqrtint(8^n) \\ Charles R Greathouse IV, Nov 18 2011
(Magma) [Floor(Sqrt(8^n)): n in [0..40]]; // Vincenzo Librandi, Nov 20 2011

Crossrefs

Cf. A017910.

Sequence in context: A074352 A301555 A261561 * A102880 A137104 A265951

Adjacent sequences: A017925 A017926 A017927 * A017929 A017930 A017931

Keyword

nonn

Author

N. J. A. Sloane

Status

approved