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A025671 Exponent of 7 (value of i) in n-th number of form 7^i*10^j. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..101.

CROSSREFS

Sequence in context: A122200 A025646 A025661 * A025652 A025662 A025640

Adjacent sequences:  A025668 A025669 A025670 * A025672 A025673 A025674

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified April 18 03:01 EDT 2014. Contains 240688 sequences.