A020428 Numbers n such that continued fraction for sqrt(n) has period 89.

2389, 3613, 4129, 4957, 5689, 7121, 7841, 7901, 8377, 8506, 9529, 10529, 12689, 13369, 13402, 13465, 14057, 15049, 15269, 16529, 19729, 20122, 21881, 22186, 23257, 23425, 24961, 27409, 28433, 29101, 30497, 31765, 31945, 32573, 35009, 35173, 36298