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A031852 Period of continued fraction for sqrt(n) contains exactly 84 ones. 0
8719, 8821, 10189, 11734, 11974, 14449, 14524, 15361, 15838, 16843, 16921, 17359, 17509, 17869, 18919, 19132, 19141, 19369, 19537, 20404, 20589, 21481, 21661, 22564, 22861, 23181, 24028, 24268, 24484, 24669, 25393, 25617, 26254, 26302, 26308, 26974 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..36.

MATHEMATICA

cf841Q[n_]:=Module[{s=Sqrt[n]}, If[IntegerQ[s], 1, Count[ ContinuedFraction[ s][[2]], 1]]==84]; Select[Range[27000], cf841Q] (* Harvey P. Dale, Dec 25 2017 *)

CROSSREFS

Sequence in context: A222815 A233679 A266578 * A115614 A165630 A250999

Adjacent sequences:  A031849 A031850 A031851 * A031853 A031854 A031855

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified December 1 05:33 EST 2021. Contains 349426 sequences. (Running on oeis4.)