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A075002
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Smallest k such that concatenation 1 to k is divisible by n; or 0 if no such number exists.
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0
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1, 2, 2, 2, 5, 2, 11, 6, 8, 10, 106, 2, 11, 22, 5, 6, 21, 8, 27, 20, 11, 106, 33, 6, 25, 30, 26, 24, 31, 20, 46, 6, 113, 64, 45, 36, 21, 64, 11, 20, 3, 24, 19, 128, 35, 68, 8, 6, 53, 50, 21, 120, 83, 26, 135, 128, 27, 82, 104, 20
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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Conjecture: For every n there exists a nonzero k such that a(n) = k.
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LINKS
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Table of n, a(n) for n=1..60.
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EXAMPLE
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a(4)= 2 as 12 is divisible by 4. a(7) = 11 as 7 divides 1234567891011 and 7 does not divide any smaller concatenations.
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CROSSREFS
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Sequence in context: A029662 A077913 A069862 * A061311 A174960 A210239
Adjacent sequences: A074999 A075000 A075001 * A075003 A075004 A075005
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 01 2002
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EXTENSIONS
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More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003
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STATUS
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approved
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