A042651 - OEIS

%I #15 Mar 19 2017 12:22:43

%S 1,4,25,104,6057,24332,152049,632528,36838673,147987220,924761993,

%T 3847035192,224052803129,900058247708,5624402289377,23397667405216,

%U 1362689111791905,5474154114572836,34207613799228921,142304609311488520,8287874953865563081

%N Denominators of continued fraction convergents to sqrt(855).

%H Vincenzo Librandi, <a href="/A042651/b042651.txt">Table of n, a(n) for n = 0..200</a>

%H <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 6082, 0, 0, 0, -1).

%F G.f.: -(x^2-4*x-1)*(x^4+26*x^2+1) / ((x^4-78*x^2+1)*(x^4+78*x^2+1)). - _Colin Barker_, Dec 20 2013

%t Denominator[Convergents[Sqrt[855], 30]] (* _Vincenzo Librandi_, Jan 26 2014 *)

%Y Cf. A042650, A040825.

%K nonn,frac,easy

%O 0,2

%A _N. J. A. Sloane_.

%E More terms from _Colin Barker_, Dec 20 2013