Primes p such that p+-2 and p+-4 are semiprimes.

Terms

a(0) =53a(1) =89a(2) =449a(3) =683a(4) =1259a(5) =4283a(6) =6803a(7) =11789a(8) =12781a(9) =13553a(10) =16561a(11) =18593a(12) =18899a(13) =20287a(14) =29303a(15) =35099a(16) =36217a(17) =37619a(18) =52163a(19) =54181a(20) =64763a(21) =65213a(22) =67103a(23) =103769a(24) =115831a(25) =116009a(26) =125551a(27) =126541a(28) =147997a(29) =154043