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%I #18 Jul 16 2023 16:28:38
%S 1,9,19,28,75,178,965,4038,5003,9041,122536,131577,254113,1148029,
%T 5994258,13136545,32267348,45403893,123075134,1153080099,32409317906,
%U 292836941253,618083200412,910920141665,2439923483742,5790767109149,31393759029487
%N Denominators of continued fraction convergents to sqrt(199).
%H Vincenzo Librandi, <a href="/A041369/b041369.txt">Table of n, a(n) for n = 0..200</a>
%H <a href="/index/Rec#order_40">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32532393040, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
%F a(n) = 32532393040*a(n-20) - a(n-40) for n>39. [_Bruno Berselli_, Dec 16 2013]
%t Denominator/@Convergents[Sqrt[199], 40] (* _Harvey P. Dale_, Mar 14 2011 *)
%Y Cf. A041368.
%K nonn,frac,easy
%O 0,2
%A _N. J. A. Sloane_.
%E More terms from _Vincenzo Librandi_, Dec 16 2013
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