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A162214
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a(n) = the largest positive multiple of n with exactly n digits when written in binary.
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1
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1, 2, 6, 12, 30, 60, 126, 248, 504, 1020, 2046, 4092, 8190, 16380, 32760, 65520, 131070, 262134, 524286, 1048560, 2097144, 4194300, 8388606, 16777200, 33554425, 67108860, 134217702, 268435440, 536870910, 1073741820, 2147483646
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n) = n * floor ((2^n-1)/n). [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Jul 11 2009]
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MAPLE
| a:= n-> n *floor ((2^n-1)/n): seq (a(n), n=1..40); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Jul 11 2009]
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CROSSREFS
| A162213
Sequence in context: A005417 A058215 A166456 * A100071 A129912 A182863
Adjacent sequences: A162211 A162212 A162213 * A162215 A162216 A162217
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KEYWORD
| base,nonn
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AUTHOR
| Leroy Quet, Jun 28 2009
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EXTENSIONS
| More terms from Alois P. Heinz (heinz(AT)hs-heilbronn.de), Jul 11 2009
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