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A017949 Powers of sqrt(15) rounded down. 1
1, 3, 15, 58, 225, 871, 3375, 13071, 50625, 196069, 759375, 2941046, 11390625, 44115700, 170859375, 661735513, 2562890625, 9926032708, 38443359375, 148890490631, 576650390625, 2233357359474, 8649755859375 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..800
FORMULA
a(n) = floor(sqrt(15^n)). - Vincenzo Librandi, Jun 24 2011
MATHEMATICA
Floor[(Sqrt[15])^Range[0, 30]] (* Harvey P. Dale, Jul 03 2020 *)
PROG
(Magma) [Floor(Sqrt(15^n)): n in [0..30]]; // Vincenzo Librandi, Jun 24 2011
(PARI) a(n)=sqrtint(15^n) \\ Charles R Greathouse IV, Nov 18 2011
CROSSREFS
Cf. A010472 (sqrt(15)).
Sequence in context: A123007 A121695 A343994 * A263173 A049178 A049150
Adjacent sequences: A017946 A017947 A017948 * A017950 A017951 A017952
KEYWORD
nonn
AUTHOR
N. J. A. Sloane
STATUS
approved

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Last modified August 30 17:25 EDT 2024. Contains 375545 sequences. (Running on oeis4.)