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Search: id:A072816
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| A072816 |
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a(n) is the smallest integer such that the mantissa of 1/a(n) contains n. |
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+0
1
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| 1, 4, 3, 7, 2, 6, 7, 8, 11, 39, 9, 8, 43, 7, 19, 6, 17, 53, 21
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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1/a(n) must contain also at least one nonzero digit after n if n ends with 0; i.e. a(10)=39 because 39 is the smallest integer such that 1/39 = 0.025641025... and 10 is followed by at least one nonzero digit (to avoid 1/10 = 0.100000...)
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EXAMPLE
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11 is the smallest integer such that 1/11 = 0.0909... contains 9, hence a(9) = 11
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CROSSREFS
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Sequence in context: A128754 A077955 A077978 this_sequence A046548 A127752 A093051
Adjacent sequences: A072813 A072814 A072815 this_sequence A072817 A072818 A072819
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KEYWORD
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base,more,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 09 2002
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