A017927 Powers of sqrt(7) rounded up.

1, 3, 7, 19, 49, 130, 343, 908, 2401, 6353, 16807, 44468, 117649, 311270, 823543, 2178890, 5764801, 15252230, 40353607, 106765609, 282475249, 747359261, 1977326743, 5231514823, 13841287201, 36620603759

Offset

0,2

Links

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

Mathematica

Ceiling[(Sqrt[7])^Range[0, 40]] (* Vincenzo Librandi, Nov 21 2011 *)

Prog

(Magma) [Ceiling(Sqrt(7^n)): n in [0..30]]; // Vincenzo Librandi, Nov 21 2011
(PARI) a(n)=ceil(sqrt(7)^n) \\ Charles R Greathouse IV, Nov 21 2011

Crossrefs

Sequence in context: A191757 A061646 A017926 * A116903 A298416 A151266

Adjacent sequences: A017924 A017925 A017926 * A017928 A017929 A017930

Keyword

nonn

Author

N. J. A. Sloane

Status

approved