OFFSET
1,1
MATHEMATICA
cfo86Q[n_]:=Module[{s=Sqrt[n], cf, len}, cf=If[IntegerQ[s], {0, 0}, ContinuedFraction[ s][[2]]]; len=Length[cf]; OddQ[len]&&cf[[(len+1)/2]] == 86]; Select[Range[1800000], cfo86Q] (* Harvey P. Dale, Jul 31 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected and extended by Harvey P. Dale, Jul 31 2013
STATUS
approved