A017925 Powers of sqrt(7) rounded down.

1, 2, 7, 18, 49, 129, 343, 907, 2401, 6352, 16807, 44467, 117649, 311269, 823543, 2178889, 5764801, 15252229, 40353607, 106765608, 282475249, 747359260, 1977326743, 5231514822, 13841287201, 36620603758

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn

Links

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

Programs

Magma

[Floor(Sqrt(7^n)): n in [0..40]]; // Vincenzo Librandi, Nov 20 2011

Mathematica

Floor[(Sqrt[7])^Range[0,40]] (* Vincenzo Librandi, Nov 20 2011 *)

PARI

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