A031689 Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 11.

123, 488, 1095, 1944, 3035, 4368, 5943, 7760, 9819, 12120, 14663, 16152, 17448, 19344, 20475, 23744, 27255, 31008, 35003, 37284, 39240, 43719, 48440, 53403, 53866, 58608, 59093, 64055, 64562, 67128, 69744, 75675, 81848, 88263, 94920, 101819

Offset

1,1

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[110000], !IntegerQ[Sqrt[#]]&&Min[ContinuedFraction[Sqrt[#]][[2]]]==11&] (* Vincenzo Librandi, Jan 27 2012 *)

Crossrefs

Cf. A031424.

Sequence in context: A179612 A091331 A248556 * A181679 A193251 A074303

Adjacent sequences: A031686 A031687 A031688 * A031690 A031691 A031692

Keyword

nonn

Author

David W. Wilson

Extensions

Content that was based on the incorrect assumption that a(n)=121*n^2+2*n removed by R. J. Mathar, Nov 18 2010

Status

approved