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%I #19 Sep 08 2022 08:44:38
%S 194481,794280046581,3243919932521508681,13248496640331026125580781,
%T 54108198377272584130510593262881,
%U 220983347100817338120002444455525554981,902518308877795191433240103403256374623457081,3685975927806112219127687339549342762856035687969181
%N a(n) = 21^(5*n + 4).
%H Vincenzo Librandi, <a href="/A013901/b013901.txt">Table of n, a(n) for n = 0..50</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 (4084101).
%F a(n) = 4084101*a(n-1), a(0)=194481. - _Vincenzo Librandi_, May 27 2011
%t NestList[4084101#&,194481,10] (* _Harvey P. Dale_, Dec 03 2014 *)
%o (Magma) [21^(5*n+4): n in [0..10]]; // _Vincenzo Librandi_, May 27 2011
%Y Cf. A009965.
%K nonn
%O 0,1
%A _N. J. A. Sloane_