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A020401 Numbers k such that the continued fraction for sqrt(k) has period 62. 0
1291, 1969, 2469, 3117, 3693, 3748, 3749, 3886, 4198, 4243, 4244, 4269, 4351, 4436, 4564, 4645, 5097, 5230, 5416, 5539, 5609, 6057, 6061, 6134, 6214, 6226, 6874, 6907, 6921, 7284, 7303, 7382, 7498, 7509, 7701, 7977, 8706, 8791, 8875, 8884, 9070, 9187 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
cf62Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 1, Length[ ContinuedFraction[ s][[2]]]]==62]; Select[Range[10000], cf62Q] (* Harvey P. Dale, Dec 14 2017 *)
CROSSREFS
Cf. A003285.
Sequence in context: A239939 A179573 A264243 * A106816 A137714 A256677
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 15 05:01 EDT 2024. Contains 371667 sequences. (Running on oeis4.)