A064475 Number of odd terms among first n terms of A064413 (if it begins at 2).

0, 0, 0, 1, 2, 2, 2, 2, 3, 4, 4, 4, 5, 6, 6, 6, 6, 6, 7, 8, 9, 9, 10, 11, 11, 11, 12, 13, 13, 13, 13, 14, 15, 15, 15, 16, 17, 18, 18, 18, 18, 19, 20, 20, 20, 20, 20, 20, 21, 22, 22, 23, 24, 24, 24, 25, 26, 26, 26, 27, 28, 28, 28, 28, 28, 29, 30, 31, 31, 31