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A078248
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Smallest multiple of n using only digits 0 and 9.
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19
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9, 90, 9, 900, 90, 90, 9009, 9000, 9, 90, 99, 900, 9009, 90090, 90, 90000, 99909, 90, 99009, 900, 9009, 990, 990909, 9000, 900, 90090, 999, 900900, 9909909, 90, 999099, 900000, 99, 999090, 90090, 900, 999, 990090, 9009, 9000, 99999, 90090, 9909909
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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With[{t=Flatten[Table[FromDigits[Join[{9}, #]]&/@Tuples[{0, 9}, n], {n, 0, 6}]]}, Flatten[Table[Select[t, Divisible[#, i]&, 1], {i, 50}]]] (* Harvey P. Dale, May 31 2014 *)
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PROG
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(Haskell)
a078248 n = head [x | x <- tail a097256_list, mod x n == 0]
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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