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 A078248 Smallest multiple of n using only digits 0 and 9. 19
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) = min{A097256(k): k > 0 and A097256(k) mod n = 0}. [Reinhard Zumkeller, Jan 10 2012] LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..1000 MATHEMATICA 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 *) PROG (Haskell) a078248 n = head [x | x <- tail a097256_list, mod x n == 0] -- Reinhard Zumkeller, Jan 10 2012 CROSSREFS Cf. A004290, A078241-A078248, A079339, A096681-A096688. Sequence in context: A296618 A230114 A187090 * A186943 A217402 A261908 Adjacent sequences:  A078245 A078246 A078247 * A078249 A078250 A078251 KEYWORD base,nonn AUTHOR Amarnath Murthy, Nov 23 2002 EXTENSIONS More terms from Ray Chandler, Jul 12 2004 STATUS approved

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Last modified September 20 16:31 EDT 2020. Contains 337265 sequences. (Running on oeis4.)