A031827 Period of continued fraction for sqrt(n) contains exactly 59 ones.

35959, 47239, 64519, 78547, 83224, 84019, 86227, 90119, 90799, 91999, 92335, 92583, 95951, 99415, 125095, 125291, 126451, 135875, 136144, 137171, 140215, 144232, 146771, 146971, 154963, 173227, 182771, 193543, 193855, 194035, 196547, 198211

Offset

1,1

Links

Table of n, a(n) for n=1..32.

Mathematica

cf59Q[n_]:=Module[{s=Sqrt[n]}, !IntegerQ[s]&&Count[ContinuedFraction[s][[2]], 1]==59]; Select[Range[200000], cf59Q] (* Harvey P. Dale, Mar 16 2013 *)

Crossrefs

Sequence in context: A216065 A236201 A034605 * A097694 A209956 A380850

Adjacent sequences: A031824 A031825 A031826 * A031828 A031829 A031830

Keyword

nonn

Author

David W. Wilson

Status

approved