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 (9261).
PROG
(Magma) [21^(3*n+2): n in [0..10]]; // Vincenzo Librandi, Jun 27 2011
(Maxima) makelist(21^(3*n+2), n, 0, 20); /* Martin Ettl, Oct 21 2012 */
(PARI) a(n)=21^(3*n+2) \\ Charles R Greathouse IV, Jul 10 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved