%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