A013828 - OEIS

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A013828

a(n) = 3^(5*n + 3).

27, 6561, 1594323, 387420489, 94143178827, 22876792454961, 5559060566555523, 1350851717672992089, 328256967394537077627, 79766443076872509863361, 19383245667680019896796723, 4710128697246244834921603689

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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 (243).

FORMULA

From Philippe Deléham, Nov 30 2008: (Start)

a(n) = 243*a(n-1), n > 0; a(0)=27.

G.f.: 27/(1-243*x).

a(n) = 3*A013827(n) = 9*A013826(n) = A013829(n)/3. (End)

MATHEMATICA

3^(5*Range[0, 20]+3) (* or *) NestList[243#&, 27, 20] (* Harvey P. Dale, Jun 07 2016 *)

PROG

(Magma) [3^(5*n+3): n in [0..15]]; // Vincenzo Librandi, Jul 07 2011

CROSSREFS

Cf. A000244 (3^n), A016885 (5*n+3).

Sequence in context: A211928 A123395 A051680 * A343922 A209261 A001321

Adjacent sequences: A013825 A013826 A013827 * A013829 A013830 A013831

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved