Numbers k such that the period of the continued fraction for sqrt(k) contains at least three 1's.

Terms

a(0) =7a(1) =13a(2) =21a(3) =31a(4) =32a(5) =43a(6) =44a(7) =46a(8) =57a(9) =58a(10) =61a(11) =67a(12) =73a(13) =74a(14) =75a(15) =76a(16) =86a(17) =88a(18) =91a(19) =92a(20) =93a(21) =94a(22) =97a(23) =103a(24) =106a(25) =108a(26) =109a(27) =111a(28) =112a(29) =113