A067390 Number of distinct prime factors in 2^n+3.

1, 1, 1, 1, 2, 1, 1, 2, 2, 2, 2, 1, 3, 2, 1, 1, 3, 1, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 4, 1, 3, 2, 4, 3, 2, 3, 3, 2, 2, 2, 3, 2, 4, 4, 2, 2, 3, 2, 3, 3, 4, 2, 5, 2, 1, 3, 3, 3, 4, 3, 2, 2, 4, 2, 5, 2, 1, 5, 3, 3, 3, 3, 3, 4, 4, 2, 4, 3, 4, 5, 4, 4, 5, 1, 4, 4, 2, 3, 5, 4, 4, 4, 4, 5, 4, 4, 6, 3, 2, 2