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A013720 15^(2n+1). 2
15, 3375, 759375, 170859375, 38443359375, 8649755859375, 1946195068359375, 437893890380859375, 98526125335693359375, 22168378200531005859375, 4987885095119476318359375, 1122274146401882171630859375 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (225).

FORMULA

a(n)=225*a(n-1), n>0 ; a(0)=15 . G.f.: 15/(1-225*x). - Philippe Deléham, Nov 25 2008

MAPLE

seq(15^(2*n+1), n=0..11); # Nathaniel Johnston, Jun 25 2011

MATHEMATICA

15^(2Range[0, 12]+1)  (* Harvey P. Dale, Feb 09 2011 *)

PROG

(MAGMA) [15^(2*n+1): n in [0..15]]; // Vincenzo Librandi, Jun 26 2011

(PARI) a(n)=15^(2*n+1) \\ Charles R Greathouse IV, Jul 11 2016

CROSSREFS

Sequence in context: A211903 A278630 A161584 * A230672 A145189 A182283

Adjacent sequences:  A013717 A013718 A013719 * A013721 A013722 A013723

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 21 23:43 EDT 2017. Contains 290940 sequences.