OFFSET
1,1
MATHEMATICA
cf11Q[n_]:=Module[{s=Sqrt[n], len, cf}, cf=If[IntegerQ[s], {2, 2}, ContinuedFraction[ s][[2]]]; len=Length[cf]; OddQ[len]&&cf[[(len+1)/2]] == 11]; Select[Range[32000], cf11Q] (* Harvey P. Dale, Mar 18 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected and extended by Harvey P. Dale, Mar 18 2018
STATUS
approved