Numbers k such that the continued fraction for sqrt(k) has period 6.

Terms

a(0) =19a(1) =21a(2) =22a(3) =45a(4) =52a(5) =54a(6) =57a(7) =59a(8) =70a(9) =77a(10) =88a(11) =107a(12) =111a(13) =112a(14) =114a(15) =117a(16) =131a(17) =164a(18) =165a(19) =175a(20) =178a(21) =183a(22) =187a(23) =208a(24) =216a(25) =221a(26) =232a(27) =267a(28) =270a(29) =273