A046455 Concatenation of the 6 prime factors of composite a(n) is a palindrome.

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

Links

Table of n, a(n) for n=1..26.

Example

3398759 = 7 * 13 * 13 * 13 * 13 * 17 -> 71313131317 is palindromic.

Crossrefs

Cf. A046447.

Sequence in context: A240845 A153160 A113851 * A092758 A030516 A056573

Adjacent sequences: A046452 A046453 A046454 * A046456 A046457 A046458

Keyword

nonn,base

Author

Patrick De Geest, Jul 15 1998

Extensions

Edited by Charles R Greathouse IV, Apr 28 2010

Status

approved