Least even number k such that the continued fraction for sqrt(k) has period n.

Terms

a(0) =2a(1) =6a(2) =130a(3) =14a(4) =74a(5) =22a(6) =58a(7) =44a(8) =106a(9) =86a(10) =298a(11) =46a(12) =746a(13) =134a(14) =1066a(15) =94a(16) =1018a(17) =424a(18) =922a(19) =268a(20) =394a(21) =166a(22) =586a(23) =382a(24) =1306a(25) =214a(26) =1354a(27) =334a(28) =1642a(29) =436