A041971 - OEIS

%I #9 Jun 14 2016 09:04:52

%S 1,1,2,11,13,193,978,1171,2149,7618,32621,40239,113099,153338,266437,

%T 419775,4464187,4883962,9348149,14232111,37812371,52044482,245990299,

%U 790015379,1036005678,1826021057,10166110963,144151574539,154317685502,915740002049

%N Denominators of continued fraction convergents to sqrt(508).

%H Vincenzo Librandi, <a href="/A041971/b041971.txt">Table of n, a(n) for n = 0..200</a>

%H <a href="/index/Rec#order_64">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0, 0, 0, 0, 0, 0, 0, 0, 89515213717502, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

%F a(n) = 89515213717502*a(n-32) - a(n-64) for n>63. - _Vincenzo Librandi_, Dec 28 2013

%t Denominator[Convergents[Sqrt[508], 30]] (* _Vincenzo Librandi_, Dec 28 2013 *)

%Y Cf. A041970.

%K nonn,frac,easy

%O 0,3

%A _N. J. A. Sloane_.

%E More terms from _Vincenzo Librandi_, Dec 28 2013