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%I #5 Oct 19 2017 03:14:59
%S 4444,545421,5555521412,555555514322,5555555551435323,
%T 555555553453434223,5555555551222222222314,555545555455554555545555,
%U 5555555555555441321122544214,555554544444352442424321331153
%N a(n) is the largest base-6 string such that the n-th number coprime to 6 does not divide any substring of a(n).
%e a(3) = 545421 (base 6) because the 3rd number coprime to 6 is 7, and 7 does not divide any substring of a(3).
%K nonn,base
%O 2,1
%A _Don Reble_, Feb 20 2006
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