OFFSET
0,1
COMMENTS
The subsequence of primes begins: 59, 359, 12959, 3627970559, 130606940159, 105567144438288796176937144911353144349827436380159, ... associated with exponents n = 1, 2, 4, 11, 13, 63, 71, ... - Jonathan Vos Post, Oct 31 2011
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (7,-6).
FORMULA
a(n) = 6*a(n-1) + 5.
a(n) = 7*a(n-1) - 6*a(n-2), n > 1.
G.f.: ( 9-4*x ) / ( (6*x-1)*(x-1) ). - R. J. Mathar, Oct 31 2011
MATHEMATICA
10(6^Range[20]) - 1 (* Alonso del Arte, Oct 31 2011 *)
PROG
(Magma) [10*6^n-1: n in [0..30]]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Oct 31 2011
STATUS
approved