A017926 Powers of sqrt(7) rounded to nearest integer.

1, 3, 7, 19, 49, 130, 343, 907, 2401, 6352, 16807, 44467, 117649, 311270, 823543, 2178890, 5764801, 15252230, 40353607, 106765609, 282475249, 747359260, 1977326743, 5231514823, 13841287201, 36620603759

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn

Links

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

Programs

Magma

[Round(Sqrt(7)^n): n in [0..40]]; // Vincenzo Librandi, Nov 19 2011

Mathematica

Floor[(Sqrt[7]^Range[0,40]+1/2)] (* Vincenzo Librandi, Nov 19 2011 *)

PARI

a(n)=round(sqrt(7)^n) \\ Charles R Greathouse IV, Nov 18 2011