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%I #24 Sep 08 2022 08:44:38
%S 49,16807,5764801,1977326743,678223072849,232630513987207,
%T 79792266297612001,27368747340080916343,9387480337647754305649,
%U 3219905755813179726837607,1104427674243920646305299201,378818692265664781682717625943
%N a(n) = 7^(3*n + 2).
%H Vincenzo Librandi, <a href="/A013741/b013741.txt">Table of n, a(n) for n = 0..100</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 (343).
%F From _Philippe Deléham_, Nov 28 2008: (Start)
%F a(n) = 343*a(n-1); a(0)=49.
%F G.f.: 49/(1-343*x). (End)
%p seq(7^(3*n+2),n=0..11); # _Nathaniel Johnston_, Jun 26 2011
%t 7^(3Range[0,20]+2) (* or *) NestList[343#&,49,20] (* _Harvey P. Dale_, Oct 03 2012 *)
%o (Magma) [7^(3*n+2): n in [0..15]]; // _Vincenzo Librandi_, May 25 2011
%o (PARI) a(n)=7^(3*n+2) \\ _Charles R Greathouse IV_, Jul 11 2016
%Y Cf. A013740.
%K nonn,easy
%O 0,1
%A _N. J. A. Sloane_
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