A025678 Exponent of 9 (value of j) in n-th number of form 2^i*9^j.

0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 6, 1, 2, 3, 4, 5, 0, 6, 1, 2, 3, 4, 5, 0, 6, 1, 2, 3, 4, 5, 0, 6, 1, 7, 2, 3, 4, 5, 0, 6, 1, 7, 2, 3, 4, 5, 0, 6