login
4*9^n+1.
1

%I #10 Sep 08 2022 08:46:00

%S 5,37,325,2917,26245,236197,2125765,19131877,172186885,1549681957,

%T 13947137605,125524238437,1129718145925,10167463313317,91507169819845,

%U 823564528378597,7412080755407365,66708726798666277,600378541187996485

%N 4*9^n+1.

%H Vincenzo Librandi, <a href="/A199562/b199562.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.: (5-13*x)/((1-x)*(1-9*x)).

%o (Magma) [4*9^n+1: n in [0..30]];

%K nonn,easy

%O 0,1

%A _Vincenzo Librandi_, Nov 08 2011