Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 28 ones.

Terms

a(0) =1381a(1) =1501a(2) =1588a(3) =1609a(4) =2137a(5) =2293a(6) =2469a(7) =2473a(8) =2476a(9) =2481a(10) =2497a(11) =2529a(12) =2564a(13) =2721a(14) =2909a(15) =3013a(16) =3073a(17) =3076a(18) =3117a(19) =3119a(20) =3149a(21) =3241a(22) =3307a(23) =3326a(24) =3343a(25) =3539a(26) =3583a(27) =3748a(28) =3847a(29) =3884