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A031689 Least term in period of continued fraction for sqrt(n) is 11. 1
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 (list; graph; refs; listen; history; text; internal format)
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

Sequence in context: A179612 A091331 A248556 * A181679 A193251 A074303

Adjacent sequences:  A031686 A031687 A031688 * A031690 A031691 A031692

KEYWORD

nonn

AUTHOR

David W. Wilson

EXTENSIONS

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

STATUS

approved

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Last modified June 13 11:17 EDT 2021. Contains 344990 sequences. (Running on oeis4.)