%I A082723
%S A082723 1,9,111,474,969,6666,18981,67276,4411144,6964696,15444451,57966975,
%T A082723 448707844,460595064,579696975,931929139,994040499,1227667221,
%U A082723 9698998969,61556965516,664248842466,699030030996,99451743334715499
%N A082723 Palindromic nonagonal (or 9-gonal or enneagonal) numbers.
%H A082723 P. De Geest, <a href="http://www.worldofnumbers.com/nona.htm">Palindromic 
               nonagonals</a>
%Y A082723 Cf. A001106, A055560.
%Y A082723 Sequence in context: A053894 A053904 A058607 this_sequence A143167 A156949 
               A155624
%Y A082723 Adjacent sequences: A082720 A082721 A082722 this_sequence A082724 A082725 
               A082726
%K A082723 nonn,base
%O A082723 1,2
%A A082723 Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 13 2003.