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%I #19 Sep 08 2022 08:44:54
%S 1,12,433,5208,187921,2260260,81557281,980947632,35395672033,
%T 425729012028,15361640105041,184765410272520,6666916409915761,
%U 80187762329261652,2893426360263335233,34801304085489284448,1255740373437877575361
%N Denominators of continued fraction convergents to sqrt(327).
%H Vincenzo Librandi, <a href="/A041617/b041617.txt">Table of n, a(n) for n = 0..200</a>
%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0, 434, 0, -1).
%F G.f.: -(x^2-12*x-1) / (x^4-434*x^2+1). - _Colin Barker_, Nov 20 2013
%F a(n) = 434*a(n-2) - a(n-4) for n>3, - _Vincenzo Librandi_, Dec 22 2013
%t Denominator[Convergents[Sqrt[327], 30]] (* _Vincenzo Librandi_, Dec 22 2013 *)
%o (Magma) I:=[1,12,433,5208]; [n le 4 select I[n] else 434*Self(n-2)-Self(n-4): n in [1..40]]; // _Vincenzo Librandi_, Dec 22 2013
%Y Cf. A041616, A040308.
%K nonn,frac,easy
%O 0,2
%A _N. J. A. Sloane_.
%E More terms from _Colin Barker_, Nov 20 2013
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