%I #24 Sep 06 2023 14:34:07
%S 15,50625,170859375,576650390625,1946195068359375,6568408355712890625,
%T 22168378200531005859375,74818276426792144775390625,
%U 252511682940423488616943359375,852226929923929274082183837890625,2876265888493261300027370452880859375
%N a(n) = 15^(3*n + 1).
%H Vincenzo Librandi, <a href="/A013756/b013756.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 (3375).
%F From _Philippe Deléham_, Dec 03 2008: (Start)
%F a(n) = 3375*a(n-1); a(0)=15
%F G.f.: 15/(1-3375*x). (End)
%t Table[15^(3n+1),{n,0,10}] (* or *) NestList[3375#&,15,10] (* _Harvey P. Dale_, Sep 06 2023 *)
%o (Magma) [15^(3*n+1): n in [0..15]]; // _Vincenzo Librandi_, Jun 27 2011
%o (PARI) a(n)=15^(3*n+1) \\ _Charles R Greathouse IV_, Jul 10 2016
%Y Subsequence of A001024.
%K nonn,easy
%O 0,1
%A _N. J. A. Sloane_