A042539 - OEIS

%I #16 Aug 14 2021 14:01:10

%S 1,4,225,904,50849,204300,11491649,46170896,2597061825,10434418196,

%T 586924480801,2358132341400,132642335599201,532927474738204,

%U 29976580920938625,120439251158492704,6774574645796530049,27218737834344612900,1531023893369094852449

%N Denominators of continued fraction convergents to sqrt(798).

%H Vincenzo Librandi, <a href="/A042539/b042539.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 (0,226,0,-1).

%F G.f.: -(x^2-4*x-1) / (x^4-226*x^2+1). - _Colin Barker_, Dec 17 2013

%t Denominator[Convergents[Sqrt[798], 30]] (* _Vincenzo Librandi_, Jan 23 2014 *)

%t LinearRecurrence[{0,226,0,-1},{1,4,225,904},20] (* _Harvey P. Dale_, Aug 14 2021 *)

%Y Cf. A042538, A040769.

%K nonn,frac,easy

%O 0,2

%A _N. J. A. Sloane_.

%E More terms from _Colin Barker_, Dec 17 2013