Primorial primes: primes of the form 1 + product of first k primes, for some k.

A018239

Primorial primes: primes of the form 1 + product of first k primes, for some k.

Terms

    a(0) =2a(1) =3a(2) =7a(3) =31a(4) =211a(5) =2311a(6) =200560490131

External references