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%I #35 Sep 08 2022 08:45:25
%S 11,33,99,297,891,2673,8019,24057,72171,216513,649539,1948617,5845851,
%T 17537553,52612659,157837977,473513931,1420541793,4261625379,
%U 12784876137,38354628411,115063885233,345191655699,1035574967097,3106724901291,9320174703873
%N a(n) = 11*3^n.
%C Square root of A120353.
%H Vincenzo Librandi, <a href="/A120354/b120354.txt">Table of n, a(n) for n = 0..300</a>
%H Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>
%H <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (3).
%F From _Philippe Deléham_, Nov 23 2008: (Start)
%F a(n) = 3*a(n-1), n > 0; a(0)=11.
%F G.f.: 11/(1-3*x). (End)
%F a(n) = 11*A000244(n). - _Michel Marcus_, Sep 04 2013
%t 11*3^Range[0, 60] (* _Vladimir Joseph Stephan Orlovsky_, Jun 09 2011 *)
%t NestList[3#&,11,30] (* _Harvey P. Dale_, Mar 04 2013 *)
%o (Magma) [11*3^n: n in [0..30]]; // _Vincenzo Librandi_, Jun 10 2011
%o (PARI) a(n)=11*3^n \\ _Charles R Greathouse IV_, Sep 04 2013
%K nonn,easy
%O 0,1
%A _Anton Joha_, Jun 25 2006
%E Better definition from _Tanya Khovanova_, Jan 20 2007
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