A025686 Exponent of 10 (value of j) in n-th number of form 4^i*10^j.

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

Offset

1,7

Links

Table of n, a(n) for n=1..107.

Crossrefs

Differs from A025657 at a(114). A025649 is the exponent of 4.

Sequence in context: A140575 A091917 A025657 * A215345 A022329 A087466

Adjacent sequences: A025683 A025684 A025685 * A025687 A025688 A025689

Keyword

nonn

Author

David W. Wilson

Status

approved