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%I #7 Dec 11 2018 13:08:45
%S 604,721,1201,1341,1348,1483,1549,1663,1747,1774,1841,1879,1966,2161,
%T 2194,2281,2377,2494,2531,2653,2662,2699,2749,2830,2921,2949,3041,
%U 3079,3089,3097,3103,3187,3236,3309,3389,3412,3424,3430,3448,3473,3529,3556
%N Period of continued fraction for sqrt(n) contains exactly 24 ones.
%t cf24Q[n_]:=Module[{s=Sqrt[n]},If[IntegerQ[s],1,Count[ContinuedFraction[s][[2]],1]]==24]; Select[Range[3600],cf24Q] (* _Harvey P. Dale_, Dec 11 2018 *)
%K nonn
%O 1,1
%A _David W. Wilson_