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A031838 Period of continued fraction for sqrt(n) contains exactly 70 ones. 0
4846, 5149, 6211, 6763, 7036, 7561, 9319, 9793, 9931, 10204, 10756, 10831, 11377, 11761, 11841, 11929, 12763, 12979, 13582, 13798, 13921, 14109, 14767, 14788, 15076, 15253, 15427, 15721, 16228, 16729, 16759, 16927, 17269, 17396, 17467, 17481, 17641 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..37.

MATHEMATICA

cf70Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 1, Count[ ContinuedFraction[ s][[2]], 1]]==70]; Select[Range[18000], cf70Q] (* Harvey P. Dale, Dec 21 2016 *)

CROSSREFS

Sequence in context: A185990 A155511 A215949 * A331664 A031826 A243835

Adjacent sequences:  A031835 A031836 A031837 * A031839 A031840 A031841

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified February 22 07:46 EST 2020. Contains 332118 sequences. (Running on oeis4.)