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%I #6 Jan 02 2015 22:49:00
%S 8,4,296,2,16,148,1144,1,98765432,8,8,74,616,572,592,5,5224,49382716,
%T 4632,4,3848,4,38296,37,32,308,326255144,286,303752,296,28648,25,
%U 26936,2612,2288,24691358,24,2316,2072,2,2168,1924,204856,2,197530864,19148
%N Least k such that decimal representation of k*n contains only digits 0 and 8.
%H Chai Wah Wu, <a href="/A096687/b096687.txt">Table of n, a(n) for n = 1..9998</a>
%F a(n) = A078247(n)/n.
%o (Python)
%o def A096687(n):
%o ....if n > 0:
%o ........for i in range(1,2**n):
%o ............q, r = divmod(8*int(bin(i)[2:]),n)
%o ............if not r:
%o ................return q
%o ....return 1 # _Chai Wah Wu_, Jan 02 2015
%Y Cf. A004290, A078241-A078248, A079339, A096681-A096688.
%K base,nonn
%O 1,1
%A _Ray Chandler_, Jul 12 2004