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 A078246 Smallest multiple of n using only digits 0 and 7. 3
 7, 70, 777, 700, 70, 7770, 7, 7000, 777777777, 70, 77, 77700, 7007, 70, 7770, 70000, 77707, 7777777770, 77007, 700, 777, 770, 770707, 777000, 700, 70070, 7707777777, 700, 7707707, 7770, 777077, 700000, 777777, 777070, 70, 77777777700, 777, 770070 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) = min{A204094(k): k > 0 and A204094(k) mod n = 0}. [Reinhard Zumkeller, Jan 10 2012] LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..998 MATHEMATICA With[{c=Rest[FromDigits/@Tuples[{0, 7}, 11]]}, Table[SelectFirst[c, Divisible[ #, n]&], {n, 40}]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Dec 27 2019 *) PROG (Haskell) a078246 n = head [x | x <- tail a204094_list, mod x n == 0] -- Reinhard Zumkeller, Jan 10 2012 CROSSREFS Cf. A004290, A078241-A078248, A079339, A096681-A096688. Sequence in context: A144848 A292841 A180902 * A268301 A228927 A097184 Adjacent sequences:  A078243 A078244 A078245 * A078247 A078248 A078249 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 17:16 EDT 2020. Contains 337265 sequences. (Running on oeis4.)