Numbers k such that the period of the continued fraction for sqrt(k) contains exactly seven 1's.

Terms

a(0) =115a(1) =135a(2) =247a(3) =464a(4) =611a(5) =744a(6) =767a(7) =1064a(8) =1479a(9) =2079a(10) =2200a(11) =2291a(12) =2360a(13) =2875a(14) =3096a(15) =3283a(16) =3367a(17) =3800a(18) =4187a(19) =4255a(20) =4408a(21) =4672a(22) =4720a(23) =4995a(24) =5151a(25) =5375a(26) =5568a(27) =5611a(28) =5983a(29) =6235