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%I #5 Mar 30 2012 18:35:26
%S 0,1,2,0,3,1,4,2,5,0,3,6,1,4,7,2,5,8,0,3,6,9,1,4,7,10,2,5,8,11,0,3,6,
%T 9,12,1,4,7,10,13,2,5,8,11,14,0,3,6,9,12,15,1,4,7,10,13,16,2,5,8,11,
%U 14,0,17,3,6,9,12,15,1,18,4,7,10,13,16,2,19,5,8,11,14,0,17,3,20,6,9,12,15,1
%N Exponent of 2 (value of i) in n-th number of form 2^i*7^j.
%K nonn
%O 1,3
%A _David W. Wilson_
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