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%I #10 Jul 10 2021 19:08:12
%S 13,29,53,74,85,89,125,173,185,218,229,293,338,346,365,373,445,533,
%T 557,629,701,733,818,845,914,925,965,985,1009,1042,1093,1105,1129,
%U 1145,1229,1373,1378,1490,1525,1685,1853,1901,1970,2029,2138,2213,2362,2378,2405
%N Numbers k such that the continued fraction for sqrt(k) has period 5.
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Walter Gilbert