Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 4.

Terms

a(0) =5a(1) =18a(2) =39a(3) =68a(4) =105a(5) =150a(6) =174a(7) =203a(8) =264a(9) =333a(10) =370a(11) =410a(12) =495a(13) =588a(14) =689a(15) =793a(16) =798a(17) =855a(18) =915a(19) =1040a(20) =1105a(21) =1173a(22) =1313a(23) =1314a(24) =1378a(25) =1387a(26) =1462a(27) =1463a(28) =1620a(29) =1785