A025651 Exponent of 5 (value of i) in n-th number of form 5^i*6^j.

0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0, 6, 5, 4, 3, 2, 1, 0, 7, 6, 5, 4, 3, 2, 1, 0, 8, 7, 6, 5, 4, 3, 2, 1, 0, 9, 8, 7, 6, 5, 4, 3, 2, 1, 10, 0, 9, 8, 7, 6, 5, 4, 3, 2, 11, 1, 10, 0, 9, 8, 7, 6, 5, 4, 3, 12, 2, 11, 1, 10, 0, 9, 8, 7, 6, 5, 4, 13, 3, 12, 2, 11, 1, 10, 0, 9, 8, 7, 6, 5, 14, 4