%I A084537
%S A084537 1,1,3,7,13,21,31,43,57,73,91,111,133,157,183,211,241,273,307,343,381,
               421
%N A084537 Duplicate of A002061.
%Y A084537 Sequence in context: A115298 A161206 A025728 this_sequence A002061 A063541 
               A011898
%Y A084537 Adjacent sequences: A084534 A084535 A084536 this_sequence A084538 A084539 
               A084540
%K A084537 dead
%O A084537 0,3