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A031806 Period of continued fraction for sqrt(n) contains exactly 38 ones. 0

%I #7 Feb 12 2016 13:12:04

%S 2038,2149,2179,2389,2791,2974,3193,3921,3943,4027,4101,4126,4237,

%T 4417,4601,4691,4701,4801,4969,5023,5209,5279,5737,5836,5926,5961,

%U 6029,6046,6346,6393,6429,6449,6491,6521,6526,6547,6718,6733,6799,6811,6826,6847

%N Period of continued fraction for sqrt(n) contains exactly 38 ones.

%t cf38Q[n_]:=Module[{s=Sqrt[n]},If[IntegerQ[s],1,Count[ ContinuedFraction[ s][[2]],1]]==38]; Select[Range[7000],cf38Q] (* _Harvey P. Dale_, Feb 12 2016 *)

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified July 13 13:53 EDT 2024. Contains 374284 sequences. (Running on oeis4.)