A068207 Numbers n such that the number of divisors of n^2-1 equals the number of divisors of n.

2, 6, 40, 54, 66, 70, 78, 80, 88, 110, 114, 128, 130, 182, 216, 222, 238, 250, 258, 276, 310, 318, 354, 366, 384, 402, 410, 418, 438, 456, 488, 498, 552, 594, 598, 616, 624, 632, 654, 678, 680, 682, 696, 726, 760, 762, 774, 786, 808, 830, 870, 906, 924, 928