%I A046453
%S A046453 16,81,625,2401,3975,4719,5565,6591,8745,10731,14399,14641,16863,20111,
%T A046453 34391,36501,39963,41019,46179,47229,48231,60813,61761,62991,69027,
%U A046453 109179,113631,116475,143991,158985,159777,162409,164145,167571,183159
%N A046453 Composite numbers n such that concatenation of the 4 prime factors of 
               n is a palindrome.
%e A046453 E.g. 164145 = 3 * 5 * 31 * 353 -> 3531353 is palindromic.
%Y A046453 Cf. A046447.
%Y A046453 Sequence in context: A108941 A153157 A113849 this_sequence A030514 A056571 
               A053909
%Y A046453 Adjacent sequences: A046450 A046451 A046452 this_sequence A046454 A046455 
               A046456
%K A046453 nonn,base
%O A046453 1,1
%A A046453 Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.