OFFSET
0,1
COMMENTS
Additive digital root of a(n) is equal to 9. - Miquel Cerda, Oct 31 2016
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 (27).
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
AUTHOR
STATUS
approved