cp's OEIS Frontend

A114909 a(n) is the largest base-7 string such that the n-th number coprime to 7 does not divide any substring of a(n).

%I A114909 #5 Oct 19 2017 03:14:59
%S A114909 5,55,656,6662,55555,6565321,66566566,666566633,6666612543,
%T A114909 65656565656,666666666513,66656665654315,656565653543211,
%U A114909 6666666666666212,66566566566566566,665665665623461651
%N A114909 a(n) is the largest base-7 string such that the n-th number coprime to 7 does not divide any substring of a(n).
%e A114909 a(3) = 55 (base 7) because the 3rd number coprime to 7 is 3, and 3 does not divide any substring of a(3).
%K A114909 nonn,base
%O A114909 2,1
%A A114909 _Don Reble_, Feb 20 2006