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A031816 Period of continued fraction for sqrt(n) contains exactly 48 ones. 0

%I

%S 3019,3331,3361,3901,4057,4486,4519,5326,5881,5923,6094,6121,6166,

%T 6361,6493,6988,7069,7209,7318,7333,7393,7621,7814,8206,8287,8353,

%U 8369,8641,8644,8781,8887,9189,9311,9481,9489,9493,9598,10144,10174,10267,10417

%N Period of continued fraction for sqrt(n) contains exactly 48 ones.

%t cf48Q[n_]:=Module[{s=Sqrt[n]},If[IntegerQ[s],1,Count[ ContinuedFraction[ s] [[2]], 1]]==48]; Select[Range[11000],cf48Q] (* _Harvey P. Dale_, Dec 18 2015 *)

%K nonn

%O 1,1

%A _David W. Wilson_

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Last modified October 20 18:25 EDT 2021. Contains 348111 sequences. (Running on oeis4.)