%I #15 Mar 19 2017 10:55:22
%S 1,1,11,56,123,3377,6877,37762,384497,422259,23186483,23608742,
%T 259273903,1319978257,2899230417,79599199516,162097629449,
%U 890087346761,9062971097059,9953058443820,546528127063339,556481185507159,6111339982134929,31113181096181804
%N Denominators of continued fraction convergents to sqrt(779).
%H Vincenzo Librandi, <a href="/A042503/b042503.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, 23570980, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
%F G.f.: -(x^18 -x^17 +11*x^16 -56*x^15 +123*x^14 -3377*x^13 +6877*x^12 -37762*x^11 +384497*x^10 -422259*x^9 -384497*x^8 -37762*x^7 -6877*x^6 -3377*x^5 -123*x^4 -56*x^3 -11*x^2 -x -1) / (x^20 -23570980*x^10 +1). - _Colin Barker_, Dec 16 2013
%t Denominator[Convergents[Sqrt[779], 30]] (* _Vincenzo Librandi_, Jan 23 2014 *)
%Y Cf. A042502, A040751.
%K nonn,frac,easy
%O 0,3
%A _N. J. A. Sloane_.
%E More terms from _Colin Barker_, Dec 16 2013