A077807 Number of distinct prime factors of numbers containing in their decimal representation only the digits 0 and 1.

0, 2, 1, 2, 1, 3, 2, 2, 3, 3, 2, 3, 2, 4, 2, 2, 2, 5, 3, 3, 4, 4, 1, 3, 3, 4, 3, 4, 2, 4, 2, 2, 2, 4, 4, 5, 3, 5, 3, 3, 3, 6, 2, 4, 4, 3, 1, 3, 3, 5, 3, 4, 2, 5, 2, 4, 2, 4, 2, 4, 2, 4, 5, 2, 2, 4, 2, 4, 2, 6, 2, 5, 2, 5, 4, 5, 2, 5, 2, 3, 2, 5, 2, 6, 3, 4, 2, 4, 1, 6, 3, 3, 4, 3, 4, 3, 3, 5, 2, 5, 1, 5, 2, 4, 3