A013779 a(n) = 3^(4*n + 3).

27, 2187, 177147, 14348907, 1162261467, 94143178827, 7625597484987, 617673396283947, 50031545098999707, 4052555153018976267, 328256967394537077627, 26588814358957503287787, 2153693963075557766310747

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 (81).

Formula

From Philippe Deléham, Nov 25 2008: (Start)

a(n) = 81*a(n-1); a(0)=27.

G.f.: 27/(1-81*x). (End)

Mathematica

3^(4*Range[0, 20]+3) (* or *) NestList[81*#&, 27, 20] (* Harvey P. Dale, May 28 2019 *)

Prog

(Magma) [3^(4*n+3): n in [0..20]]; // Vincenzo Librandi, Jun 27 2011

Crossrefs

Subsequence of A000244.

Sequence in context: A304119 A017199 A223476 * A075081 A017307 A167725

Adjacent sequences: A013776 A013777 A013778 * A013780 A013781 A013782

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved