%I #11 Mar 19 2017 10:24:42
%S 1,1,8,9,17,26,147,1496,7627,9123,16750,25873,197861,223734,11384561,
%T 11608295,92642626,104250921,196893547,301144468,1702615887,
%U 17327303338,88339132577,105666435915,194005568492,299672004407,2291709599341,2591381603748
%N Denominators of continued fraction convergents to sqrt(670).
%H Vincenzo Librandi, <a href="/A042289/b042289.txt">Table of n, a(n) for n = 0..200</a>
%H <a href="/index/Rec#order_28">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11582422, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
%F a(n) = 11582422*a(n-14) - a(n-28) for n>27. - _Vincenzo Librandi_, Jan 19 2014
%t Denominator[Convergents[Sqrt[670], 30]] (* _Vincenzo Librandi_, Jan 19 2014 *)
%Y Cf. A042288.
%K nonn,frac,easy
%O 0,3
%A _N. J. A. Sloane_.
%E More terms from _Vincenzo Librandi_, Jan 19 2014