OFFSET
0,2
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (17,-79,63).
FORMULA
G.f.: 1/(1-9*x) + 1/(1-7*x) - 1/(1-x).
E.g.f.: e^(9*x) + e^(7*x) - e^x.
a(n) = 16*a(n-1)-63*a(n-2)-48 with a(0) = 1, a(1) = 15. - Vincenzo Librandi, Jul 21 2010
MATHEMATICA
Table[9^n + 7^n - 1, {n, 0, 25}] (* Paolo Xausa, Jul 28 2024 *)
PROG
(PARI) a(n)=9^n+7^n-1 \\ Charles R Greathouse IV, Jun 11 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Jan 31 2009
STATUS
approved