%I A028503
%S A028503 1,2,9,17,23,64,75,99,191,204,999,1747,1907,2365,2966,5731,9999,
%T A028503 18991,20564,99999,174601,174747,179317,243063,293786,552101,999999,
%U A028503 1868287,2967032,9200156,9999999,22765895,31552659,93809716
%N A028503 Numbers n such that n(n+2) is a palindrome.
%H A028503 P. De Geest, <a href="http://www.worldofnumbers.com/quapron.htm">Palindromic 
               quasipronic numbers of the form n(n+2)</a>
%Y A028503 Cf. A005563, A028504.
%Y A028503 Sequence in context: A062981 A069622 A137189 this_sequence A100291 A083419 
               A126082
%Y A028503 Adjacent sequences: A028500 A028501 A028502 this_sequence A028504 A028505 
               A028506
%K A028503 nonn,base
%O A028503 1,2
%A A028503 Patrick De Geest (pdg(AT)worldofnumbers.com)