A025681 Exponent of 9 (value of j) in n-th number of form 7^i*9^j.

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

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Crossrefs

Cf. A025631.