A013829 a(n) = 3^(5*n + 4).

81, 19683, 4782969, 1162261467, 282429536481, 68630377364883, 16677181699666569, 4052555153018976267, 984770902183611232881, 239299329230617529590083, 58149737003040059690390169, 14130386091738734504764811067

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy

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).

Crossrefs

Cf. A000244, A016897.

Programs

Magma

[3^(5*n+4): n in [0..15]]; // Vincenzo Librandi, Jul 07 2011

Mathematica

NestList[243#&,81,12] (* Harvey P. Dale, Jan 23 2016 *)

Maxima

makelist(3^(5*n+4),n,0,20); /* Martin Ettl, Oct 21 2012 */

PARI

a(n)=3^(5*n+4) \\ Charles R Greathouse IV, Jul 11 2016

Formula

From Philippe Deléham, Nov 26 2008: (Start)

a(n) = 243*a(n-1); a(0)=81.

G.f.: 81/(1-243*x). (End)

a(n) = A000244(A016897(n)). - Wesley Ivan Hurt, Sep 04 2022