Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 20 ones.

Terms

a(0) =478a(1) =669a(2) =724a(3) =751a(4) =766a(5) =889a(6) =958a(7) =1289a(8) =1318a(9) =1409a(10) =1499a(11) =1531a(12) =1576a(13) =1589a(14) =1669a(15) =1709a(16) =1713a(17) =1732a(18) =1738a(19) =1753a(20) =1783a(21) =1828a(22) =1829a(23) =1873a(24) =1933a(25) =1969a(26) =2059a(27) =2073a(28) =2095a(29) =2169