Primes p such that (pp'-1)/2 is prime, where p' denotes the next prime after p.

Terms

a(0) =3a(1) =5a(2) =11a(3) =29a(4) =41a(5) =71a(6) =137a(7) =281a(8) =461a(9) =599a(10) =641a(11) =787a(12) =827a(13) =881a(14) =1091a(15) =1129a(16) =1301a(17) =1409a(18) =1607a(19) =1627a(20) =1951a(21) =2129a(22) =2267a(23) =2357a(24) =2381a(25) =2557a(26) =2687a(27) =2887a(28) =2917a(29) =3469