A096003 Smallest semiprime (A001358) which is at the end of an arithmetic progression of n semiprimes.

4, 6, 14, 46, 58, 221, 445, 497, 1211, 1561, 4195, 4393, 6347, 10717, 14233, 28213, 31451, 72965, 119029, 121603, 124177, 611261, 632171, 2003171, 2012771, 7466993, 7619243, 7771493, 7923743, 68029097, 142247113, 168901739

Offset: 1

Author

N. J. A. Sloane, Jul 28 2004

Keywords

• nonn

Comments

a(33) <= 1320196303 (gap of 39029760). a(34) <= 1359226063 (gap of 39029760). a(35) <= 1398255823 (gap of 39029760). - Donovan Johnson, Jun 03 2012

Examples

			a(3)=14 since (4,9,14) [or (6,10,14)] is an arithmetic progression of 3 semiprimes ending in 14 and 14 is the smallest semiprime with this property.
		

Crossrefs

Cf. A001358 (semiprimes), A005115 (analog for primes).

For the associated gaps see A097824.

Extensions

More terms from T. D. Noe and Ray Chandler, Jul 29 2004

a(18)-a(20) from Ray Chandler, Aug 01 2004

More terms from Hugo Pfoertner, Aug 27 2004

a(26)-a(30) from Hugo Pfoertner, Sep 07 2004

a(31)-a(32) from Donovan Johnson, Jun 03 2012