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A020421 Numbers n such that continued fraction for sqrt(n) has period 82. 0
2164, 2614, 2641, 2644, 3067, 3397, 4468, 4723, 5059, 5062, 6106, 6249, 6937, 7021, 7291, 7499, 7654, 8243, 8434, 8516, 9206, 9307, 9361, 9561, 9569, 9694, 9777, 10053, 10173, 10349, 10469, 10677, 11133, 11171, 11241, 11416, 11845, 11860, 11899, 12219 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..40.

MATHEMATICA

cf82Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], False, Length[ ContinuedFraction[ s][[2]]]==82]]; Select[Range[13000], cf82Q] (* Harvey P. Dale, Dec 17 2013 *)

CROSSREFS

Sequence in context: A035872 A126831 A161998 * A203736 A251067 A184558

Adjacent sequences:  A020418 A020419 A020420 * A020422 A020423 A020424

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified July 18 07:10 EDT 2019. Contains 325134 sequences. (Running on oeis4.)