Primes p with f(p), f(f(p)), f(f(f(p))), f(f(f(f(p)))) all prime, where f(n) = prime(n) - n + 1.

Terms

a(0) =2a(1) =3a(2) =2861a(3) =8753a(4) =56821a(5) =83449a(6) =162787a(7) =165883a(8) =167197a(9) =186397a(10) =217309a(11) =261721a(12) =275939a(13) =309493a(14) =355571a(15) =382351a(16) =467293a(17) =501187a(18) =539303a(19) =560029a(20) =602839a(21) =640307a(22) =657299a(23) =708959a(24) =879859a(25) =919129a(26) =973813a(27) =1057741a(28) =1085779a(29) =1115899