A025671 Exponent of 7 (value of i) in n-th number of form 7^i*10^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, 7, 0, 6, 5, 4, 3, 2, 8, 1, 7, 0, 6, 5, 4, 3, 9, 2, 8, 1, 7, 0, 6, 5, 4, 10, 3, 9, 2, 8, 1, 7, 0, 6, 5, 11, 4, 10, 3, 9, 2, 8, 1, 7, 0, 6, 12, 5, 11, 4, 10, 3, 9, 2, 8, 1, 7, 13, 0, 6, 12, 5, 11, 4, 10, 3, 9, 2, 8, 14, 1, 7, 13, 0, 6

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Crossrefs

Cf. A025632.