%I A031516
%S A031516 326,334,354,358,374,382,386,398,732,741,753,789,804,813,831,849,897,
%T A031516 1300,1324,1340,1348,1356,1372,1388,1396,1412,1436,1452,1460,1468,1492,
%U A031516 1500,1516,1532,1548,1556,1564,1588,1596,2030,2045,2095,2105,2155,2195
%N A031516 Numbers n such that continued fraction for sqrt(n) has even period and 
               central term 18.
%Y A031516 Sequence in context: A048909 A097739 A048918 this_sequence A066128 A138816 
               A138817
%Y A031516 Adjacent sequences: A031513 A031514 A031515 this_sequence A031517 A031518 
               A031519
%K A031516 nonn
%O A031516 1,1
%A A031516 David W. Wilson (davidwwilson(AT)comcast.net)