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%I #5 Mar 30 2012 18:35:26
%S 0,1,0,2,1,3,0,2,4,1,3,5,0,2,4,6,1,3,5,7,0,2,4,6,8,1,3,5,7,0,9,2,4,6,
%T 8,1,10,3,5,7,0,9,2,11,4,6,8,1,10,3,12,5,7,0,9,2,11,4,13,6,8,1,10,3,
%U 12,5,14,7,0,9,2,11,4,13,6,15,8,1,10,3,12,5,14,7,0,16,9,2,11,4,13,6,15,8,1,17,10
%N Exponent of 3 (value of i) in n-th number of form 3^i*7^j.
%K nonn
%O 1,4
%A _David W. Wilson_
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