A025705 Index of 4^n within sequence of numbers of form 4^i*10^j.

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

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