id:A046449 - OEIS Search Results

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Smallest composite number with n distinct prime factors with property that the concatenation of its distinct prime factors is a palindrome.

+0
4

4, 39, 429, 5565, 94605, 1040655, 2332655745, 178516966485, 4105890229155, 867388559982945, 37297708079266635, 1529206031249932035 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(5)=94605 has 5 distinct factors 3 * 5 * 7 * 17 * 53 and 3571753 is palindromic.`
	CROSSREFS	`Cf. A046447, A046448, A046450.` `Adjacent sequences: A046446 A046447 A046448 this_sequence A046450 A046451 A046452` `Sequence in context: A093851 A063035 A123618 this_sequence A068187 A024055 A066399`
	KEYWORD	`nonn,hard,nice,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.`
	EXTENSIONS	`More terms from Arlin Anderson (starship1(AT)gmail.com), Mar 11, 2000`

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Last modified July 4 09:27 EDT 2009. Contains 160562 sequences.

AT&T Labs Research