%I A046447
%S A046447 1,4,8,9,16,25,27,32,39,49,64,69,81,119,121,125,128,129,159,219,243,
%T A046447 249,256,259,329,339,343,403,429,469,507,512,625,669,679,729,795,1024,
%U A046447 1207,1309,1329,1331,1533,1547,1587,1589,1703,2023,2048,2097,2187,2319
%N A046447 Apart from initial term, composite numbers with property that concatenation 
               of prime factors is a palindrome.
%e A046447 E.g. 81 = 3 * 3 * 3 * 3 -> 3333 is palindromic.
%Y A046447 Cf. A046448, A046449, A046450.
%Y A046447 Sequence in context: A075309 A175031 A052054 this_sequence A087244 A080062 
               A088949
%Y A046447 Adjacent sequences: A046444 A046445 A046446 this_sequence A046448 A046449 
               A046450
%K A046447 nonn,nice,base
%O A046447 1,2
%A A046447 Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.