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A155634 7^n + 5^n - 1. 17

%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

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Last modified January 22 13:06 EST 2021. Contains 340362 sequences. (Running on oeis4.)