%I #17 Mar 19 2017 10:24:12
%S 1,1,4,5,14,33,80,113,419,532,27019,27551,109672,137223,384118,905459,
%T 2195036,3100495,11496521,14597016,741347321,755944337,3009180332,
%U 3765124669,10539429670,24843984009,60227397688,85071381697,315441542779,400512924476
%N Denominators of continued fraction convergents to sqrt(665).
%H Vincenzo Librandi, <a href="/A042279/b042279.txt">Table of n, a(n) for n = 0..200</a>
%H <a href="/index/Rec#order_20">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 27438, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
%F G.f.: -(x^18 -x^17 +4*x^16 -5*x^15 +14*x^14 -33*x^13 +80*x^12 -113*x^11 +419*x^10 -532*x^9 -419*x^8 -113*x^7 -80*x^6 -33*x^5 -14*x^4 -5*x^3 -4*x^2 -x -1) / (x^20 -27438*x^10 +1). - _Colin Barker_, Dec 06 2013
%p convert(sqrt(665),confrac,30,cvgts): denom(cvgts); # _Wesley Ivan Hurt_, Dec 07 2013
%t Denominator[Convergents[Sqrt[665], 30]] (* _Vincenzo Librandi_, Jan 19 2014 *)
%Y Cf. A042278, A040639.
%K nonn,frac,easy
%O 0,3
%A _N. J. A. Sloane_.
%E More terms from _Colin Barker_, Dec 06 2013