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%I #19 Mar 20 2023 05:07:02
%S 1,23,287,3455,41471,497663,5971967,71663615,859963391,10319560703,
%T 123834728447,1486016741375,17832200896511,213986410758143,
%U 2567836929097727,30814043149172735,369768517790072831,4437222213480873983
%N a(n) = 2*12^n-1.
%H Vincenzo Librandi, <a href="/A199031/b199031.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 (13,-12).
%F a(n) = 12*a(n-1)+11.
%F a(n) = 13*a(n-1)-12*a(n-2).
%F G.f.: (1+10*x)/((1-x)*(1-12*x)). - _Bruno Berselli_, Nov 03 2011
%t LinearRecurrence[{13,-12},{1,23},40] (* _Harvey P. Dale_, Feb 21 2013 *)
%o (Magma) [2*12^n-1: n in [0..20]];
%K nonn,easy
%O 0,2
%A _Vincenzo Librandi_, Nov 03 2011
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