%I #15 Sep 05 2022 21:50:47
%S 1,4,17,21,227,248,1219,5124,236923,952816,4048187,5001003,54058217,
%T 59059220,290295097,1220239608,56421317065,226905507868,964043348537,
%U 1190948856405,12873531912587,14064480768992,69131454988555,290590300723212,13436285288256307
%N Denominators of continued fraction convergents to sqrt(540).
%H Vincenzo Librandi, <a href="/A042033/b042033.txt">Table of n, a(n) for n = 0..200</a>
%H <a href="/index/Rec#order_16">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,0,0,238142,0,0,0,0,0,0,0,-1).
%F G.f.: -(x^14 -4*x^13 +17*x^12 -21*x^11 +227*x^10 -248*x^9 +1219*x^8 -5124*x^7 -1219*x^6 -248*x^5 -227*x^4 -21*x^3 -17*x^2 -4*x -1) / ((x^8 -488*x^4 +1)*(x^8 +488*x^4 +1)). - _Colin Barker_, Nov 29 2013
%F a(n) = 238142*a(n-8) - a(n-16). - _Wesley Ivan Hurt_, Sep 05 2022
%t Denominator[Convergents[Sqrt[540], 30]] (* _Vincenzo Librandi_, Jan 12 2014 *)
%Y Cf. A042032, A040516.
%K nonn,frac,easy
%O 0,2
%A _N. J. A. Sloane_.
%E More terms from _Colin Barker_, Nov 29 2013
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