A046456 - OEIS

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A046456

Concatenation of the 7 prime factors of composite a(n) is a palindrome.

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; internal format)

	OFFSET	`1,1`
	EXAMPLE	`E.g. 17998875 = 3 * 3 * 3 * 5 * 5 * 5 * 5333 -> 3335555333 is palindromic.`
	CROSSREFS	`Cf. A046447.` `Sequence in context: A001015 A050754 A113852 * A092759 A056574 A096961` `Adjacent sequences: A046453 A046454 A046455 * A046457 A046458 A046459`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.`
	EXTENSIONS	`Edited by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Apr 28 2010`

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Last modified February 17 04:58 EST 2012. Contains 205985 sequences.