OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (12,-35,24).
FORMULA
G.f.: 1/(1-8*x)-1/(1-3*x)+1/(1-x).
E.g.f.: e^(8*x)-e^(3*x)+e^x.
a(n) = 11*a(n-1)-24*a(n-2)+14 with a(0)=1, a(1)=6. - Vincenzo Librandi, Jul 21 2010
MATHEMATICA
Table[8^n-3^n+1, {n, 0, 20}] (* or *) LinearRecurrence[{12, -35, 24}, {1, 6, 56}, 20] (* Harvey P. Dale, Mar 12 2014 *)
PROG
(PARI) a(n)=8^n-3^n+1 \\ Charles R Greathouse IV, Oct 07 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Jan 26 2009
STATUS
approved