A013738 a(n) = 6^(3*n + 1).

6, 1296, 279936, 60466176, 13060694016, 2821109907456, 609359740010496, 131621703842267136, 28430288029929701376, 6140942214464815497216, 1326443518324400147398656, 286511799958070431838109696

Offset

0,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..100

Tanya Khovanova, Recursive Sequences

Index entries for linear recurrences with constant coefficients, signature (216).

Formula

From Philippe Deléham, Nov 25 2008: (Start)

a(n) = 216*a(n-1); a(0)=6.

G.f.: 6/(1-216*x). (End)

Maple

seq(6^(3*n+1), n=0..11); # Nathaniel Johnston, Jun 26 2011

Mathematica

6^(3*Range[0, 20]+1) (* or *) NestList[216#&, 6, 20] (* Harvey P. Dale, Jan 01 2012 *)

Prog

(Magma) [6^(3*n+1): n in [0..20]]; // Vincenzo Librandi, May 25 2011
(PARI) a(n)=6^(3*n+1) \\ Charles R Greathouse IV, Jul 11 2016

Crossrefs

Cf. A013739.

Sequence in context: A264103 A202381 A067510 * A209590 A076781 A055306

Adjacent sequences: A013735 A013736 A013737 * A013739 A013740 A013741

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved