OFFSET
1,1
MATHEMATICA
cf23Q[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]] == 23]; Select[Range[132000], cf23Q] (* Harvey P. Dale, Dec 13 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
First term 530 removed by Georg Fischer, Jun 16 2019
STATUS
approved