OFFSET
1,1
MATHEMATICA
cf68Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 1, Length[ ContinuedFraction[ s][[2]]]]==68]; Select[Range[11000], cf68Q] (* Harvey P. Dale, Aug 20 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved