A025686 - OEIS

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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

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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