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A046455
Concatenation of the 6 prime factors of composite a(n) is a palindrome.
0
64, 729, 15625, 99375, 117649, 272685, 525819, 570999, 1040655, 1058145, 1113879, 1229865, 1608285, 1742279, 1771561, 2006697, 2040423, 2262771, 2371551, 3101259, 3398759, 3599775, 4835523, 4963299, 5039685, 5495301
OFFSET
1,1
EXAMPLE
3398759 = 7 * 13 * 13 * 13 * 13 * 17 -> 71313131317 is palindromic.
CROSSREFS
Cf. A046447.
Sequence in context: A240845 A153160 A113851 * A092758 A030516 A056573
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jul 15 1998
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 28 2010
STATUS
approved