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Period of continued fraction for sqrt(n) contains at least three 1's.
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%I #8 Mar 30 2012 18:55:49

%S 7,13,21,31,32,43,44,46,57,58,61,67,73,74,75,76,86,88,91,92,93,94,97,

%T 103,106,108,109,111,112,113,115,116,124,129,133,134,135,136,137,139,

%U 151,157,158,159,160,161,162,163,166,172,179,181,183,184,185,186,190,191,193,199

%N Period of continued fraction for sqrt(n) contains at least three 1's.

%D Kenneth H. Rosen, Elementary Number Theory and Its Applications, Addison-Wesley, 1984, page 426 (but beware of errors!).

%K nonn

%O 1,1

%A _Clark Kimberling_

%E More terms from _David W. Wilson_