%I A025638
%S A025638 0,1,2,3,0,4,1,5,2,6,3,0,7,4,1,8,5,2,9,6,3,0,10,7,4,1,11,8,5,2,12,9,6,
               3,
%T A025638 0,13,10,7,4,1,14,11,8,5,2,15,12,9,6,3,0,16,13,10,7,4,1,17,14,11,8,5,2,
%U A025638 18,15,12,9,6,3,19,0,16,13,10,7,4,20,1,17,14,11,8,5,21,2,18,15,12,9,6,
               22
%N A025638 Exponent of 2 (value of i) in n-th number of form 2^i*9^j.
%Y A025638 Sequence in context: A166238 A014197 A021438 this_sequence A025639 A140502 
               A154860
%Y A025638 Adjacent sequences: A025635 A025636 A025637 this_sequence A025639 A025640 
               A025641
%K A025638 nonn
%O A025638 1,3
%A A025638 David W. Wilson (davidwwilson(AT)comcast.net)