A031835 - OEIS

A031835

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 67 ones.

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

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OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

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