%I A031597
%S A031597 9803,9811,9839,9843,9851,9859,9871,9883,9887,9899,9907,9923,9931,9959,
%T A031597 9963,9967,9987,9991,10007,10019,10031,10039,10067,10079,10083,10091,
%U A031597 10099,10103,10107,10111,10131,10139,10147,10151,10159,10163,10199,39208
%N A031597 Numbers n such that continued fraction for sqrt(n) has even period and 
               central term 99.
%Y A031597 Sequence in context: A113937 A036353 A031687 this_sequence A031777 A022199 
               A001230
%Y A031597 Adjacent sequences: A031594 A031595 A031596 this_sequence A031598 A031599 
               A031600
%K A031597 nonn
%O A031597 1,1
%A A031597 David W. Wilson (davidwwilson(AT)comcast.net)