OFFSET
1,1
MATHEMATICA
cf51Q[n_]:=Module[{sr=Sqrt[n], x}, x=If[IntegerQ[sr], 1, Count[ ContinuedFraction[ sr][[2]], 1]]; x==51]; Select[Range[200000], cf51Q] (* Harvey P. Dale, Jan 19 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved