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Denominators of continued fraction convergents to sqrt(630).
2

%I #18 Sep 06 2021 19:02:52

%S 1,10,501,5020,251501,2520030,126253001,1265050040,63378755001,

%T 635052600050,31816008757501,318795140175060,15971573017510501,

%U 160034525315280070,8017697838781514001,80337012913130420080,4024868343495302518001,40329020447866155600090

%N Denominators of continued fraction convergents to sqrt(630).

%H Vincenzo Librandi, <a href="/A042209/b042209.txt">Table of n, a(n) for n = 0..200</a>

%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (0,502,0,-1).

%F G.f.: -(x^2 - 10*x - 1) / (x^4 - 502*x^2 + 1). - _Colin Barker_, Dec 04 2013

%t Denominator[Convergents[Sqrt[630], 30]] (* _Vincenzo Librandi_, Jan 16 2014 *)

%t LinearRecurrence[{0,502,0,-1},{1,10,501,5020},20] (* _Harvey P. Dale_, Sep 06 2021 *)

%Y Cf. A042208, A040604.

%K nonn,frac,easy

%O 0,2

%A _N. J. A. Sloane_

%E More terms from _Colin Barker_, Dec 04 2013