A017950 Powers of sqrt(15) rounded to nearest integer.

1, 4, 15, 58, 225, 871, 3375, 13071, 50625, 196070, 759375, 2941047, 11390625, 44115701, 170859375, 661735514, 2562890625, 9926032709, 38443359375, 148890490632, 576650390625, 2233357359475, 8649755859375

Offset

0,2

Links

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

Mathematica

Floor[(Sqrt[15]^Range[0, 40]+1/2)] (* Vincenzo Librandi, Nov 19 2011 *)

Prog

(PARI) a(n)=round(sqrt(15)^n) \\ Charles R Greathouse IV, Nov 18 2011
(Magma) [Round(Sqrt(15)^n): n in [0..40]]; // Vincenzo Librandi, Nov 19 2011

Crossrefs

Sequence in context: A307570 A164589 A377315 * A003126 A160156 A102052

Adjacent sequences: A017947 A017948 A017949 * A017951 A017952 A017953

Keyword

nonn

Author

N. J. A. Sloane

Status

approved