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A046455 Concatenation of the 6 prime factors of composite a(n) is a palindrome. 0

%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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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)