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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
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
Sequence in context: A296618 A230114 A187090 * A186943 A217402 A261908
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 March 29 08:08 EDT 2024. Contains 371265 sequences. (Running on oeis4.)