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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 July 19 03:54 EDT 2019. Contains 325144 sequences. (Running on oeis4.)