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A090493
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Least k such that n^k contains all the digits from 0 through 9, or 0 if no such k exists.
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1
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0, 68, 39, 34, 19, 20, 18, 28, 24, 0, 23, 22, 22, 21, 12, 17, 14, 21, 17, 51, 17, 18, 14, 19, 11, 18, 13, 11, 12, 39, 11, 14, 16, 14, 19, 10, 13, 14, 17, 34, 11, 17, 13, 16, 15, 11, 12, 12, 9, 18, 16, 11, 13, 10, 12, 7, 13, 11, 11, 20, 14, 18, 13, 14, 10, 13, 10, 9, 11, 18, 15
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Note that the values of n for which a(n) = 1 have density 1.
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LINKS
| T. D. Noe, Table of n, a(n) for n = 1..1000
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FORMULA
| a(10^e) = 0; a(m^e)=a(m)/e for e dividing a(m). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 06 2004
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EXAMPLE
| a(5)=19: 5^19= 19073486328125.
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CROSSREFS
| Cf. A171102.
Sequence in context: A196109 A196106 A171744 * A143737 A043595 A043828
Adjacent sequences: A090490 A090491 A090492 * A090494 A090495 A090496
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 03 2003
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EXTENSIONS
| More terms from Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 06 2004
Corrected a(15), a(17), a(38), a(48), a(56) and a(65). (For each of these terms, the only 1 in n^k is the first digit.). - Jon E. Schoenfield (jonscho(AT)hiwaay.net), Sep 20 2008
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