login
6*(10^n-7)
0

%I #13 Jun 17 2017 03:56:13

%S 18,558,5958,59958,599958,5999958,59999958,599999958,5999999958,

%T 59999999958,599999999958,5999999999958,59999999999958,

%U 599999999999958,5999999999999958,59999999999999958,599999999999999958

%N 6*(10^n-7)

%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (11,-10).

%F G.f. 18*x*(1+20*x) / ( (10*x-1)*(x-1) ). - R. J. Mathar, Aug 24 2011

%F a(n) = 18*A033175(n-1). - R. J. Mathar, Aug 24 2011

%t 6(10^Range[20]-7) (* _Harvey P. Dale_, Mar 22 2011 *)

%K nonn,easy

%O 1,1

%A _Vincenzo Librandi_