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%I #27 Sep 08 2022 08:44:38
%S 343,823543,1977326743,4747561509943,11398895185373143,
%T 27368747340080916343,65712362363534280139543,
%U 157775382034845806615042743,378818692265664781682717625943,909543680129861140820205019889143,2183814375991796599109312252753832343
%N a(n) = 7^(4*n + 3).
%H Vincenzo Librandi, <a href="/A013787/b013787.txt">Table of n, a(n) for n = 0..200</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 (2401).
%F From _Philippe Deléham_, Dec 02 2008: (Start)
%F a(n) = 2401*a(n-1); a(0)=343.
%F G.f.: 343/(1-2401*x).
%F a(n) = 49*A013786(n). (End)
%t 7^(4*Range[0,10]+3) (* or *) NestList[2401#&,343,10] (* _Harvey P. Dale_, Sep 09 2021 *)
%o (Magma) [7^(4*n+3): n in [0..15]]; // _Vincenzo Librandi_, Jun 28 2011
%o (Maxima) makelist(7^(4*n+3),n,0,20); /* _Martin Ettl_, Oct 21 2012 */
%o (PARI) a(n)=7^(4*n+3) \\ _Charles R Greathouse IV_, Jul 11 2016
%K nonn,easy
%O 0,1
%A _N. J. A. Sloane_
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