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