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

0,2

Links

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

Mathematica

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

Prog

(PARI) a(n)=sqrtint(7^n) \\ Charles R Greathouse IV, Nov 18 2011
(Magma) [Floor(Sqrt(7^n)): n in [0..40]]; // Vincenzo Librandi, Nov 20 2011

Crossrefs

Sequence in context: A182197 A022726 A192873 * A030236 A074141 A122931

Adjacent sequences: A017922 A017923 A017924 * A017926 A017927 A017928

Keyword

nonn

Author

N. J. A. Sloane

Status

approved