A042515 - OEIS

%I #13 Jun 13 2015 00:49:46

%S 1,28,1569,43960,2463329,69017172,3867424961,108356916080,

%T 6071854725441,170120289228428,9532808051517409,267088745731715880,

%U 14966502569027606689,419329160678504703172,23497399500565290984321,658346515176506652264160,36890902249384937817777281

%N Denominators of continued fraction convergents to sqrt(786).

%H Vincenzo Librandi, <a href="/A042515/b042515.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 (0,1570,0,-1).

%F G.f.: -(x^2-28*x-1) / (x^4-1570*x^2+1). - _Colin Barker_, Dec 17 2013

%t Denominator[Convergents[Sqrt[786], 30]] (* _Vincenzo Librandi_, Jan 23 2014 *)

%Y Cf. A042514, A040757.

%K nonn,frac,easy

%O 0,2

%A _N. J. A. Sloane_.

%E More terms from _Colin Barker_, Dec 17 2013