A025670 Exponent of 7 (value of i) in n-th number of form 7^i*9^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, 9, 0, 8, 7, 6, 5, 4, 3, 2, 10, 1, 9, 0, 8, 7, 6, 5, 4, 3, 11, 2, 10, 1, 9, 0, 8, 7, 6, 5, 4, 12, 3, 11, 2, 10, 1, 9, 0, 8, 7, 6, 5, 13, 4, 12, 3, 11, 2, 10, 1, 9, 0, 8, 7, 6, 14, 5

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Crossrefs

Cf. A025631.