%I #15 Mar 17 2023 14:42:41
%S 7,67,727,7987,87847,966307,10629367,116923027,1286153287,14147686147,
%T 155624547607,1711870023667,18830570260327,207136272863587,
%U 2278499001499447,25063489016493907,275698379181432967,3032682170995762627
%N a(n) = 6*11^n + 1.
%H Vincenzo Librandi, <a href="/A199756/b199756.txt">Table of n, a(n) for n = 0..900</a>
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (12,-11).
%F a(n) = 11*a(n-1)-10.
%F a(n) = 12*a(n-1)-11*a(n-2).
%F G.f.: (7-17*x)/((1-x)*(1-11*x)).
%t 6*11^Range[0,20]+1 (* or *) LinearRecurrence[{12,-11},{7,67},20] (* _Harvey P. Dale_, Jul 16 2014 *)
%o (Magma) [6*11^n+1: n in [0..30]];
%K nonn,easy
%O 0,1
%A _Vincenzo Librandi_, Nov 10 2011