OFFSET
1,1
MATHEMATICA
cf70Q[n_]:=Module[{s=Sqrt[n], cf, len}, cf=If[IntegerQ[s], {1, 1}, ContinuedFraction[ s][[2]]]; len=Length[cf]; OddQ[len]&&cf[[(len+1)/2]] == 70]; Select[Range[11 10^5], cf70Q] (* Harvey P. Dale, Jul 24 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected and extended and definition clarified by Harvey P. Dale, Jul 24 2017
STATUS
approved