A023589 Number of distinct prime divisors of 2*p(n)+1.

1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1, 1, 3, 2, 2, 2, 2, 1, 3, 1, 2, 2, 2, 2, 3, 2, 2, 1, 1, 2, 1, 2, 2, 3, 2, 2, 3, 2, 1, 1, 3, 1, 2, 2, 2, 2, 3, 1, 2, 1, 3, 2, 3, 2, 3, 2, 2, 2, 2, 1, 3, 2, 3, 2, 2, 3, 2, 3, 1, 2, 1, 2, 2, 1, 2, 3, 2, 2, 3, 2, 3, 1, 2, 2, 1, 2, 2