A162684 a(1)=1. a(n) = the number of terms among (a(1),a(2),...a(n-1)) that either are coprime to n or divide n.

1, 1, 2, 3, 4, 4, 6, 6, 6, 4, 10, 10, 12, 4, 8, 9, 16, 8, 18, 11, 14, 6, 22, 16, 22, 6, 19, 12, 28, 13, 30, 16, 20, 8, 28, 20, 36, 8, 27, 21, 40, 14, 42, 16, 26, 10, 46, 26, 42, 13, 35, 18, 52, 18, 44, 22, 39, 13, 58, 26, 60, 14, 39, 27, 49, 19, 66, 22, 45, 22, 70, 32, 72, 19, 42, 24