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A025705 Index of 4^n within sequence of numbers of form 4^i*10^j. 0
1, 2, 4, 6, 9, 13, 17, 22, 27, 33, 40, 47, 55, 63, 72, 82, 92, 103, 114, 126, 139, 152, 166, 180, 195, 211, 227, 244, 261, 279, 298, 317, 337, 357, 378, 400, 422, 445, 468, 492, 517, 542, 568, 594, 621, 649, 677, 706, 735, 765, 796, 827, 859, 891, 924, 958, 992, 1027 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..58.

CROSSREFS

Sequence in context: A194209 A183143 A184977 * A022792 A025697 A255977

Adjacent sequences:  A025702 A025703 A025704 * A025706 A025707 A025708

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 24 05:38 EDT 2021. Contains 348217 sequences. (Running on oeis4.)