%I A090638
%S A090638 0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9,10,11,11,12,12,13,14,14,15,16,16,17,17
%N A090638 Duplicate of A073869.
%Y A090638 Sequence in context: A160511 A055930 A079952 this_sequence A057363 A073869 
               A060143
%Y A090638 Adjacent sequences: A090635 A090636 A090637 this_sequence A090639 A090640 
               A090641
%K A090638 dead
%O A090638 1,4