Primes p such that primorial(p)/2 + 2 is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =13a(5) =29a(6) =31a(7) =37a(8) =47a(9) =59a(10) =109a(11) =223a(12) =307a(13) =389a(14) =457a(15) =1117a(16) =1151a(17) =2273a(18) =9137a(19) =10753a(20) =15727a(21) =25219a(22) =26459a(23) =29251a(24) =30259a(25) =52901a(26) =194471