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

1,1

Comments

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

Links

Table of n, a(n) for n=1..15.

Formula

For each p, the semiprime is p+4.

Example

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

Crossrefs

Cf. A001358, A137625, A137626, A137628.

Sequence in context: A094165 A111994 A092851 * A138395 A050151 A009162

Adjacent sequences: A137624 A137625 A137626 * A137628 A137629 A137630

Keyword

more,nonn

Author

Enoch Haga, Jan 30 2008

Extensions

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

Status

approved