A137627 Semiprimes (p+4) associated with first prime in A137625.

6, 33, 177, 713, 1745, 8301, 8301, 19217, 175233, 175233, 33952613, 4377722627, 4377722627, 1242030992177, 1242030992177

Offset: 1

Author

Enoch Haga, Jan 30 2008

Keywords

• more
• nonn

Comments

Some terms may overlap: e.g., k=9 and k=10 both begin with p=175229 where p+4 = 175233.

Examples

			a(2)=33 because if p=29, then p+4 is 33 and semiprime (3*11).
		

Crossrefs

Cf. A001358, A137625, A137626, A137628.

Formula

For each p, the semiprime is p+4.

Extensions

a(1) corrected by and a(11)-a(15) from Giovanni Resta, Jun 22 2018