%I #7 Oct 27 2019 00:33:56
%S 64,729,15625,99375,117649,272685,525819,570999,1040655,1058145,
%T 1113879,1229865,1608285,1742279,1771561,2006697,2040423,2262771,
%U 2371551,3101259,3398759,3599775,4835523,4963299,5039685,5495301
%N Concatenation of the 6 prime factors of composite a(n) is a palindrome.
%e 3398759 = 7 * 13 * 13 * 13 * 13 * 17 -> 71313131317 is palindromic.
%Y Cf. A046447.
%K nonn,base
%O 1,1
%A _Patrick De Geest_, Jul 15 1998
%E Edited by _Charles R Greathouse IV_, Apr 28 2010
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