a(n) = least prime of the form n*k! + 1.

Terms

a(0) =2a(1) =3a(2) =7a(3) =5a(4) =11a(5) =7a(6) =43a(7) =17a(8) =19a(9) =11a(10) =23a(11) =13a(12) =79a(13) =29a(14) =31a(15) =17a(16) =103a(17) =19a(18) =457a(19) =41a(20) =43a(21) =23a(22) =47a(23) =577a(24) =151a(25) =53a(26) =163a(27) =29a(28) =59a(29) =31