Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 42 ones.

Terms

a(0) =1516a(1) =2164a(2) =2374a(3) =2881a(4) =3049a(5) =3259a(6) =3313a(7) =3319a(8) =3511a(9) =3571a(10) =3631a(11) =3868a(12) =4054a(13) =4099a(14) =4449a(15) =4549a(16) =5116a(17) =5121a(18) =5158a(19) =5221a(20) =5227a(21) =5422a(22) =5446a(23) =5596a(24) =6043a(25) =6073a(26) =6163a(27) =6374a(28) =6577a(29) =6609