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%I #12 Jul 06 2024 16:11:28
%S 6891,6899,6907,6911,6939,6947,6959,6963,6967,6971,6983,6987,6991,
%T 7011,7019,7027,7031,7039,7043,7079,7083,7103,7123,7127,7131,7139,
%U 7151,7159,7179,7187,7199,7207,7211,7219,7223,27560,27648,27680,27688,27744,27752
%N Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 83.
%K nonn
%O 1,1
%A _David W. Wilson_