Sophie Germain primes p such that p + 2 and p - 2 are semiprimes.

Terms

a(0) =23a(1) =53a(2) =89a(3) =113a(4) =131a(5) =251a(6) =293a(7) =491a(8) =683a(9) =719a(10) =953a(11) =1439a(12) =1499a(13) =1511a(14) =1733a(15) =2393a(16) =3491a(17) =3779a(18) =5171a(19) =7043a(20) =7151a(21) =7433a(22) =7649a(23) =7901a(24) =8069a(25) =8663a(26) =9689a(27) =10781a(28) =12011a(29) =12653