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A013733
a(n) = 3^(3n+2).
5
9, 243, 6561, 177147, 4782969, 129140163, 3486784401, 94143178827, 2541865828329, 68630377364883, 1853020188851841, 50031545098999707, 1350851717672992089, 36472996377170786403, 984770902183611232881, 26588814358957503287787
OFFSET
0,1
COMMENTS
Additive digital root of a(n) is equal to 9. - Miquel Cerda, Oct 31 2016
FORMULA
a(n)=27*a(n-1), n>0 ; a(0)=9 . G.f.: 9/(1-27*x). - Philippe Deléham, Nov 25 2008
MAPLE
seq(3^(3*n+2), n=0..15); # Nathaniel Johnston, Jun 26 2011
MATHEMATICA
Table[3^(3n+2), {n, 0, 100}] (* Wesley Ivan Hurt, Oct 24 2013 *)
PROG
(Magma) [3^(3*n+2): n in [0..25]]; // Vincenzo Librandi, May 25 2011
(PARI) a(n)=3^(3*n+2) \\ Charles R Greathouse IV, Jul 11 2016
CROSSREFS
KEYWORD
nonn,easy
STATUS
approved