Numbers k such that the continued fraction for sqrt(k) has period 2.

Terms

a(0) =3a(1) =6a(2) =8a(3) =11a(4) =12a(5) =15a(6) =18a(7) =20a(8) =24a(9) =27a(10) =30a(11) =35a(12) =38a(13) =39a(14) =40a(15) =42a(16) =48a(17) =51a(18) =56a(19) =63a(20) =66a(21) =68a(22) =72a(23) =80a(24) =83a(25) =84a(26) =87a(27) =90a(28) =99a(29) =102