OFFSET
1,1
MATHEMATICA
cf13Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 1, Length[ContinuedFraction[s][[2]]]==13]]; Select[ Range[9000], cf13Q] (* Harvey P. Dale, Aug 07 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved