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%I #5 Mar 30 2012 18:35:26
%S 0,1,0,2,1,0,3,2,1,0,4,3,2,1,0,5,4,3,2,1,0,6,5,4,3,2,1,0,7,6,5,4,3,2,
%T 1,0,8,7,6,5,4,3,2,1,9,0,8,7,6,5,4,3,2,10,1,9,0,8,7,6,5,4,3,11,2,10,1,
%U 9,0,8,7,6,5,4,12,3,11,2,10,1,9,0,8,7,6,5,13,4,12,3,11,2,10,1,9,0,8,7,6,14,5
%N Exponent of 7 (value of i) in n-th number of form 7^i*9^j.
%K nonn
%O 1,4
%A _David W. Wilson_
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