Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 18 ones.

Terms

a(0) =244a(1) =508a(2) =556a(3) =619a(4) =631a(5) =652a(6) =694a(7) =769a(8) =772a(9) =796a(10) =811a(11) =823a(12) =844a(13) =907a(14) =964a(15) =974a(16) =1057a(17) =1063a(18) =1069a(19) =1198a(20) =1481a(21) =1648a(22) =1660a(23) =1777a(24) =1786a(25) =1809a(26) =1816a(27) =1819a(28) =1852a(29) =1964