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