a(n+1) = (a(n)-1)-th prime + 1, a(1) = 2.

Terms

a(0) =2a(1) =3a(2) =4a(3) =6a(4) =12a(5) =32a(6) =128a(7) =710a(8) =5382a(9) =52712a(10) =648392a(11) =9737334a(12) =174440042a(13) =3657500102a(14) =88362852308