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A031835 Period of continued fraction for sqrt(n) contains exactly 67 ones. 0
35011, 38191, 51671, 72479, 75763, 79864, 86395, 93991, 105283, 115768, 139855, 152447, 164728, 170704, 171856, 174479, 175195, 176287, 179219, 184507, 197467, 197723, 204179, 211479, 219064, 230231, 239992, 242755, 245391, 279827, 284959 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..31.

MATHEMATICA

cf67Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], False, Count[ ContinuedFraction[ s] [[2]], 1]==67]]; Select[Range[300000], cf67Q] (* Harvey P. Dale, Dec 17 2013 *)

CROSSREFS

Sequence in context: A237065 A233631 A281886 * A250525 A251063 A234988

Adjacent sequences: A031832 A031833 A031834 * A031836 A031837 A031838

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified February 2 21:10 EST 2023. Contains 360024 sequences. (Running on oeis4.)