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%I #15 Sep 08 2022 08:46:00
%S 10,100,1090,11980,131770,1449460,15944050,175384540,1929229930,
%T 21221529220,233436821410,2567805035500,28245855390490,
%U 310704409295380,3417748502249170,37595233524740860,413547568772149450,4549023256493643940
%N a(n) = 9*11^n+1.
%H Vincenzo Librandi, <a href="/A199763/b199763.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.: 10*(1-2*x)/((1-x)*(1-11*x)).
%t 9*11^Range[0,20]+1 (* or *) LinearRecurrence[{12,-11},{10,100},20] (* _Harvey P. Dale_, Sep 06 2021 *)
%o (Magma) [9*11^n+1: n in [0..30]];
%K nonn,easy
%O 0,1
%A _Vincenzo Librandi_, Nov 10 2011
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