%I #20 Sep 08 2022 08:44:38
%S 19,130321,893871739,6131066257801,42052983462257059,
%T 288441413567621167681,1978419655660313589123979,
%U 13569980418174090907801371961,93076495688256089536609610280499
%N a(n) = 19^(3*n + 1).
%H Vincenzo Librandi, <a href="/A013764/b013764.txt">Table of n, a(n) for n = 0..90</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 (6859).
%F a(n) = 6859*a(n-1), a(0)= 19. - _Vincenzo Librandi_, May 24 2011
%t NestList[6859#&,19,20] (* _Harvey P. Dale_, May 17 2018 *)
%o (Magma) [19^(3*n+1): n in [0..15]]; // _Vincenzo Librandi_, May 24 2011
%o (PARI) a(n)=19^(3*n+1) \\ _Charles R Greathouse IV_, Jul 10 2016
%K nonn,easy
%O 0,1
%A _N. J. A. Sloane_
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