A017951 - OEIS

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A017951

Powers of sqrt(15) rounded up.

1

1, 4, 15, 59, 225, 872, 3375, 13072, 50625, 196070, 759375, 2941047, 11390625, 44115701, 170859375, 661735514, 2562890625, 9926032709, 38443359375, 148890490632, 576650390625, 2233357359475, 8649755859375

(list; graph; refs; listen; history; text; internal format)

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