A115661 Numbers n which have the same number of distinct prime divisors as the reverse of n.

1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 15, 16, 17, 21, 22, 23, 26, 28, 31, 32, 33, 36, 37, 39, 44, 45, 51, 54, 55, 56, 57, 58, 61, 62, 63, 65, 66, 68, 69, 71, 73, 75, 77, 79, 82, 85, 86, 88, 93, 96, 97, 99, 101, 107, 108, 111, 113, 115, 116, 117, 121, 122, 123, 125, 128