|
%I
%S 1,11,73,467,3025,19931,133273,901667,6155425,42306731,292240873,
%T 2026154867,14085427825,98109713531,684326588473,4778079088067,
%U 33385518460225,233393453440331,1632228295176073,11417968671701267
%N 7^n + 5^n - 1.
%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (13,-47,35).
%F G.f.: 1/(1-7*x)+1/(1-5*x)-1/(1-x). E.g.f.: e^(7*x)+e^(5*x)-e^x.
%F a(n)=12*a(n-1)-35*a(n-2)-24 with a(0)=1, a(1)=11 [From _Vincenzo Librandi_, Jul 21 2010]
%o (PARI) a(n)=7^n+5^n-1 \\ _Charles R Greathouse IV_, Dec 22 2011
%K nonn,easy
%O 0,2
%A _Mohammad K. Azarian_, Jan 30 2009
|
