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%I #5 Mar 30 2012 18:39:16
%S 1,6,1,6,7,6,1,6,6,1,6,6,1,5,1,6,6,1,6,7,6,1,6,6,1,5,1,6,7,6,1,6,6,1,
%T 5,1,6,6,1,6,6,1,6,7,6,1,6,6,1,5,1,6,7,6,1,6,6,1,6,6,1,5,1,6,6,1,6,7,
%U 6,1,5,1,6,6,1,6,7,6,1,6,6,1,5,1,6,6,1,6,6,1,6,7,6,1,6,6,1,5,1,6,7,6,1,6,6
%N Continued fraction for sum(k>=0,1/7^(2^k-1)).
%C Contains only elements 1<=a(n)<=7 ( but 2,3 and 4 never occur)
%Y Cf. A004200.
%K cofr,nonn
%O 1,2
%A _Benoit Cloitre_, Apr 10 2003
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