A163127 a(1)=1. a(n) = the number of integers k, 1 <= k <= n-1, where GCD(a(k),n-k) >= 2.

1, 0, 0, 1, 2, 2, 3, 3, 3, 4, 4, 5, 5, 5, 5, 5, 6, 6, 7, 8, 8, 8, 8, 9, 9, 11, 11, 10, 9, 11, 10, 12, 14, 12, 13, 14, 14, 16, 14, 17, 16, 15, 18, 17, 18, 18, 20, 20, 21, 18, 20, 23, 23, 22, 22, 23, 24, 22, 24, 25, 28, 24, 29, 23, 28, 27, 28, 26, 29, 26, 30, 30, 31, 32, 33, 31, 32, 31