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A046456 Concatenation of the 7 prime factors of composite a(n) is a palindrome. 0
128, 2187, 78125, 496875, 823543, 1908795, 3680733, 6280989, 11447205, 11639595, 14480427, 15839397, 15988245, 17998875, 19165069, 19487171, 22073667, 22444653, 27340845, 30830163, 35277795, 38975433, 44183867 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

EXAMPLE

17998875 = 3 * 3 * 3 * 5 * 5 * 5 * 5333 -> 3335555333 is palindromic.

CROSSREFS

Cf. A046447.

Sequence in context: A050754 A343287 A113852 * A092759 A056574 A096961

Adjacent sequences:  A046453 A046454 A046455 * A046457 A046458 A046459

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jul 15 1998

EXTENSIONS

Edited by Charles R Greathouse IV, Apr 28 2010

STATUS

approved

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Last modified November 29 15:46 EST 2021. Contains 349416 sequences. (Running on oeis4.)