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%I #11 Sep 08 2022 08:46:00
%S 5,32,221,1544,10805,75632,529421,3705944,25941605,181591232,
%T 1271138621,8897970344,62285792405,436000546832,3052003827821,
%U 21364026794744,149548187563205,1046837312942432,7327861190597021,51295028334179144
%N (9*7^n+1)/2.
%H Vincenzo Librandi, <a href="/A199486/b199486.txt">Table of n, a(n) for n = 0..1000</a>
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (8,-7).
%F a(n) = 7*a(n-1)-3.
%F a(n) = 8*a(n-1)-7*a(n-2).
%F G.f.: (5-8*x)/((1-x)*(1-7*x)).
%o (Magma) [(9*7^n+1)/2: n in [0..30]];
%K nonn,easy
%O 0,1
%A _Vincenzo Librandi_, Nov 07 2011
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