Smallest prime of form (n!)*k + 1.

Terms

a(0) =2a(1) =3a(2) =7a(3) =73a(4) =241a(5) =2161a(6) =15121a(7) =161281a(8) =1088641a(9) =10886401a(10) =39916801a(11) =958003201a(12) =18681062401