Primes p such that 4!+p is also prime.

Terms

a(0) =5a(1) =7a(2) =13a(3) =17a(4) =19a(5) =23a(6) =29a(7) =37a(8) =43a(9) =47a(10) =59a(11) =73a(12) =79a(13) =83a(14) =89a(15) =103a(16) =107a(17) =113a(18) =127a(19) =139a(20) =149a(21) =157a(22) =167a(23) =173a(24) =199a(25) =227a(26) =233a(27) =239a(28) =257a(29) =269