A020395 Numbers n such that continued fraction for sqrt(n) has period 56.

1039, 1852, 1948, 2188, 2497, 2529, 3022, 3343, 3799, 3884, 3911, 3937, 4079, 4124, 4390, 4405, 4423, 4540, 4679, 4943, 5433, 5646, 5764, 6141, 6244, 6332, 6334, 6428, 6505, 7017, 7255, 7495, 7525, 7708, 7792, 7806, 7813, 7821, 7852, 7882, 7916, 8071