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A031852 Period of continued fraction for sqrt(n) contains exactly 84 ones. 0

%I #7 Dec 25 2017 12:43:38

%S 8719,8821,10189,11734,11974,14449,14524,15361,15838,16843,16921,

%T 17359,17509,17869,18919,19132,19141,19369,19537,20404,20589,21481,

%U 21661,22564,22861,23181,24028,24268,24484,24669,25393,25617,26254,26302,26308,26974

%N Period of continued fraction for sqrt(n) contains exactly 84 ones.

%t 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 *)

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)