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A013829
a(n) = 3^(5*n + 4).
2
81, 19683, 4782969, 1162261467, 282429536481, 68630377364883, 16677181699666569, 4052555153018976267, 984770902183611232881, 239299329230617529590083, 58149737003040059690390169, 14130386091738734504764811067
OFFSET
0,1
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
MATHEMATICA
NestList[243#&, 81, 12] (* Harvey P. Dale, Jan 23 2016 *)
PROG
(Magma) [3^(5*n+4): n in [0..15]]; // Vincenzo Librandi, Jul 07 2011
(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
CROSSREFS
Sequence in context: A143653 A222621 A116007 * A100533 A088063 A017200
KEYWORD
nonn,easy
STATUS
approved