A031779 Period of continued fraction for sqrt(n) contains exactly 11 ones.

1075, 1675, 2183, 2623, 2783, 2871, 3075, 3224, 3256, 3551, 3915, 4675, 5656, 6808, 6815, 7599, 7663, 7987, 8299, 8399, 8695, 8995, 9271, 10672, 10855, 11395, 11403, 11919, 12728, 13407, 14608, 14672, 15023, 15568, 15640, 15768, 16119, 16856, 17043

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Mathematica

oQ[n_]:=Module[{sqn=Sqrt[n]}, !IntegerQ[sqn]&&Count[ ContinuedFraction[ sqn][[2]], 1]==11]; Select[Range[20000], oQ] (* Harvey P. Dale, Nov 10 2011 *)

Crossrefs

Sequence in context: A250636 A329148 A014364 * A336781 A237213 A235959

Adjacent sequences: A031776 A031777 A031778 * A031780 A031781 A031782

Keyword

nonn

Author

David W. Wilson

Status

approved