This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A078248 #14 May 31 2014 09:49:25
%S A078248 9,90,9,900,90,90,9009,9000,9,90,99,900,9009,90090,90,90000,99909,90,
%T A078248 99009,900,9009,990,990909,9000,900,90090,999,900900,9909909,90,
%U A078248 999099,900000,99,999090,90090,900,999,990090,9009,9000,99999,90090,9909909
%N A078248 Smallest multiple of n using only digits 0 and 9.
%C A078248 a(n) = min{A097256(k): k > 0 and A097256(k) mod n = 0}. [_Reinhard Zumkeller_, Jan 10 2012]
%H A078248 Reinhard Zumkeller, <a href="/A078248/b078248.txt">Table of n, a(n) for n = 1..1000</a>
%t A078248 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 *)
%o A078248 (Haskell)
%o A078248 a078248 n = head [x | x <- tail a097256_list, mod x n == 0]
%o A078248 -- _Reinhard Zumkeller_, Jan 10 2012
%Y A078248 Cf. A004290, A078241-A078248, A079339, A096681-A096688.
%K A078248 base,nonn
%O A078248 1,1
%A A078248 _Amarnath Murthy_, Nov 23 2002
%E A078248 More terms from _Ray Chandler_, Jul 12 2004