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%I #13 Sep 08 2022 08:44:38
%S 8000,1280000000,204800000000000,32768000000000000000,
%T 5242880000000000000000000,838860800000000000000000000000,
%U 134217728000000000000000000000000000,21474836480000000000000000000000000000000,3435973836800000000000000000000000000000000000
%N a(n) = 20^(4*n+3).
%H Vincenzo Librandi, <a href="/A013813/b013813.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 (160000).
%o (Magma) [20^(4*n+3): n in [0..15]]; // _Vincenzo Librandi_, Jul 06 2011
%K nonn,easy
%O 0,1
%A _N. J. A. Sloane_