A069345 n minus the number of its prime-factors: a(n)=n-A001222(n).

1, 1, 2, 2, 4, 4, 6, 5, 7, 8, 10, 9, 12, 12, 13, 12, 16, 15, 18, 17, 19, 20, 22, 20, 23, 24, 24, 25, 28, 27, 30, 27, 31, 32, 33, 32, 36, 36, 37, 36, 40, 39, 42, 41, 42, 44, 46, 43, 47, 47, 49, 49, 52, 50, 53, 52, 55, 56, 58, 56, 60, 60, 60, 58