A013827 a(n) = 3^(5*n + 2).

9, 2187, 531441, 129140163, 31381059609, 7625597484987, 1853020188851841, 450283905890997363, 109418989131512359209, 26588814358957503287787, 6461081889226673298932241, 1570042899082081611640534563

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 26 2008: (Start)

a(n) = 243*a(n-1), n > 0; a(0)=9.

G.f.: 9/(1-243*x).

a(n) = 3*A013826(n). (End)

Mathematica

3^(5*Range[0, 20]+2) (* or *) NestList[243#&, 9, 20] (* Harvey P. Dale, Feb 05 2020 *)

Prog

(Magma) [3^(5*n+2): n in [0..15]]; // Vincenzo Librandi, Jul 07 2011
(PARI) a(n)=3^(5*n+2) \\ Charles R Greathouse IV, Jul 11 2016

Crossrefs

Cf. A000244 (3^n), A016873 (5*n+2).

Sequence in context: A162091 A172959 A250915 * A058428 A323517 A278914

Adjacent sequences: A013824 A013825 A013826 * A013828 A013829 A013830

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved