A017951 Powers of sqrt(15) rounded up.

1, 4, 15, 59, 225, 872, 3375, 13072, 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..800

Mathematica

Ceiling[(Sqrt[15])^Range[0, 40]] (* Vincenzo Librandi, Nov 21 2011 *)

Prog

(Magma) [Ceiling(Sqrt(15^n)): n in [0..30]]; // Vincenzo Librandi, Nov 21 2011

Crossrefs

Sequence in context: A102052 A128714 A007342 * A326212 A199210 A129155

Adjacent sequences: A017948 A017949 A017950 * A017952 A017953 A017954

Keyword

nonn

Author

N. J. A. Sloane

Status

approved