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%I #10 Sep 08 2022 08:46:00
%S 3,19,163,1459,13123,118099,1062883,9565939,86093443,774840979,
%T 6973568803,62762119219,564859072963,5083731656659,45753584909923,
%U 411782264189299,3706040377703683,33354363399333139,300189270593998243
%N 2*9^n+1.
%H Vincenzo Librandi, <a href="/A199559/b199559.txt">Table of n, a(n) for n = 0..1000</a>
%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (10,-9).
%F a(n) = 9*a(n-1)-8.
%F a(n) = 10*a(n-1)-9*a(n-2).
%F G.f.: (3-11*x)/((1-x)*(1-9*x)).
%o (Magma) [2*9^n+1: n in [0..30]];
%K nonn,easy
%O 0,1
%A _Vincenzo Librandi_, Nov 08 2011
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