A074647 a(n)=m is the n-th number such that GCD (A074639(m), A000010(m))=1.

1, 2, 3, 5, 7, 11, 17, 19, 23, 29, 31, 37, 41, 47, 53, 59, 61, 67, 71, 73, 83, 89, 97, 101, 107, 131, 137, 139, 149, 151, 163, 167, 173, 179, 191, 193, 197, 211, 223, 227, 229, 233, 239, 251, 257, 263, 269, 277, 283, 289, 293, 307, 311