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

1,1

Links

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

Example

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

Crossrefs

Cf. A000142, A001013, A025487.

Sequence in context: A359410 A108454 A235483 * A228877 A258879 A053014

Adjacent sequences: A064780 A064781 A064782 * A064784 A064785 A064786

Keyword

easy,nonn

Author

Alford Arnold, Oct 19 2001

Extensions

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

Offset corrected by Amiram Eldar, Jan 02 2021

Status

approved