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A096687 Least k such that decimal representation of k*n contains only digits 0 and 8.

%I A096687 #9 Feb 04 2025 11:38:03
%S A096687 8,4,296,2,16,148,1144,1,98765432,8,8,74,616,572,592,5,5224,49382716,
%T A096687 4632,4,3848,4,38296,37,32,308,326255144,286,303752,296,28648,25,
%U A096687 26936,2612,2288,24691358,24,2316,2072,2,2168,1924,204856,2,197530864,19148
%N A096687 Least k such that decimal representation of k*n contains only digits 0 and 8.
%H A096687 Chai Wah Wu, <a href="/A096687/b096687.txt">Table of n, a(n) for n = 1..9998</a>
%F A096687 a(n) = A078247(n)/n.
%o A096687 (Python)
%o A096687 def A096687(n):
%o A096687     if n > 0:
%o A096687         for i in range(1, 2**n):
%o A096687             q, r = divmod(8*int(bin(i)[2:]), n)
%o A096687             if not r:
%o A096687                 return q
%o A096687     return 1 # _Chai Wah Wu_, Jan 02 2015
%Y A096687 Cf. A004290, A078241-A078248, A079339, A096681-A096688.
%K A096687 base,nonn
%O A096687 1,1
%A A096687 _Ray Chandler_, Jul 12 2004