%I #10 Sep 08 2022 08:46:00
%S 11,81,641,5121,40961,327681,2621441,20971521,167772161,1342177281,
%T 10737418241,85899345921,687194767361,5497558138881,43980465111041,
%U 351843720888321,2814749767106561,22517998136852481,180143985094819841
%N 10*8^n+1.
%H Vincenzo Librandi, <a href="/A199557/b199557.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 (9,-8).
%F a(n) = 8*a(n-1)-7.
%F a(n) = 9*a(n-1)-8*a(n-2).
%F G.f.: (11-18*x)/((1-x)*(1-8*x)).
%o (Magma) [10*8^n+1: n in [0..30]];
%K nonn,easy
%O 0,1
%A _Vincenzo Librandi_, Nov 08 2011