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%I #10 Jul 10 2021 19:35:19
%S 139,163,283,417,419,424,519,549,562,566,633,657,758,781,787,805,808,
%T 831,873,879,951,976,998,999,1000,1005,1012,1048,1142,1163,1185,1199,
%U 1209,1210,1274,1281,1286,1307,1310,1337,1362,1377,1379,1411,1426,1432,1492
%N Numbers k such that the continued fraction for sqrt(k) has period 18.
%K nonn
%O 1,1
%A _David W. Wilson_
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