OFFSET
0,1
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 (6561).
FORMULA
From Philippe Deléham, Dec 07 2008: (Start)
a(n) = 6561*a(n-1); a(0)=9.
G.f.: 9/(1-6561*x).
a(n) = A013791(n)/81. (End)
PROG
(Magma) [9^(4*n+1): n in [0..15]]; // Vincenzo Librandi, Jun 28 2011
(Maxima) makelist(9^(4*n+1), n, 0, 20); /* Martin Ettl, Oct 21 2012 */
(PARI) a(n)=9^(4*n+1) \\ Charles R Greathouse IV, Jul 11 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved