A046449 Smallest composite number with n distinct prime factors with property that the concatenation of its distinct prime factors is a palindrome.

4, 39, 429, 5565, 94605, 1040655, 2332655745, 178516966485, 4105890229155, 867388559982945, 37297708079266635, 1529206031249932035

Offset: 1

Author

Patrick De Geest, Jul 15 1998

Keywords

• nonn
• hard
• nice
• base

Comments

Subsequence of A046447. - Michel Marcus, Dec 06 2014

Examples

			a(5)=94605 has 5 distinct factors 3 * 5 * 7 * 17 * 53 and 3571753 is palindromic.
		

Crossrefs

Cf. A046447, A046448, A046450.

Extensions

More terms from Arlin Anderson (starship1(AT)gmail.com), Mar 11 2000