|
%I #16 Sep 08 2022 08:45:59
%S 9,29,89,269,809,2429,7289,21869,65609,196829,590489,1771469,5314409,
%T 15943229,47829689,143489069,430467209,1291401629,3874204889,
%U 11622614669,34867844009,104603532029,313810596089,941431788269,2824295364809
%N a(n) = 10*3^n - 1.
%H Vincenzo Librandi, <a href="/A198645/b198645.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 (4,-3).
%F a(n) = 3*a(n-1) + 2, a(0)=9.
%F G.f. ( 9-7*x ) / ( (3*x-1)*(x-1) ). - _R. J. Mathar_, Oct 30 2011
%t 10 * 3^Range[0,30]-1 (* _Harvey P. Dale_, Feb 28 2022 *)
%o (Magma) [10*3^n-1: n in [0..30]]
%Y Cf. A048473.
%K nonn,easy
%O 0,1
%A _Vincenzo Librandi_, Oct 28 2011
|
