A064783 Least prime signature numbers that are not a Jordan-Polya number.

30, 60, 180, 210, 360, 420, 840, 900, 1080, 1260, 1680, 1800, 2160, 2310, 2520, 3360, 3600, 4620, 5400, 6300, 6480, 6720, 7200, 7560, 9240, 10800, 12600, 12960, 13440, 13860, 15120, 18480, 21600, 25200, 26880, 27000, 27720, 30030, 32400, 36960

Offset: 1

Author

Alford Arnold, Oct 19 2001

Keywords

• easy
• nonn

Examples

			a(1)= 30 since 30 is a least prime signature (cf. A025487) but is not the product of factorial numbers (cf. A001013).
		

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000142, A001013, A025487.

Extensions

More terms from Naohiro Nomoto and Don Reble, Oct 21 2001

Offset corrected by Amiram Eldar, Jan 02 2021