Next term is greater than 2000.
Table of n, a(n) for n=1..6.
9 is in the sequence because 123456789+2 is prime.
Cf. A099081, A099083.
Sequence in context: A288143 A120228 A053749 * A062217 A190691 A135979
Adjacent sequences: A099079 A099080 A099081 * A099083 A099084 A099085
Farideh Firoozbakht, Oct 23 2004