%I A082721
%S A082721 3,8,9,12,22,24,27,30,36,38,40
%N A082721 There exist no palindromic hexagonals of length n.
%H A082721 P. De Geest, <a href="http://www.worldofnumbers.com/hexa.htm">Palindromic 
               hexagonals</a>
%Y A082721 Cf. A034822, A059868, A059869, A059870, A082722, A034307.
%Y A082721 Sequence in context: A087286 A165289 A066494 this_sequence A071677 A084747 
               A101065
%Y A082721 Adjacent sequences: A082718 A082719 A082720 this_sequence A082722 A082723 
               A082724
%K A082721 nonn,base,hard
%O A082721 1,1
%A A082721 Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 13 2003.