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%I #19 Sep 26 2023 16:31:07
%S 441,1801088541,7355827511386641,30041942495081691894741,
%T 122694327386105632949003612841,501096025171921401632658604207540941,
%U 2046526777500669368329342638102622164679041,8358222058517261267863236597617557285387836027141
%N a(n) = 21^(5*n + 2).
%H Vincenzo Librandi, <a href="/A013899/b013899.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)=441. - _Vincenzo Librandi_, May 27 2011
%t NestList[4084101#&,441,10] (* _Harvey P. Dale_, Sep 26 2023 *)
%o (Magma) [21^(5*n+2): n in [0..10]]; // _Vincenzo Librandi_, May 27 2011
%Y Cf. A009965.
%K nonn
%O 0,1
%A _N. J. A. Sloane_
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