Greatest p with p, q both prime, p+q = 2n.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =7a(5) =11a(6) =13a(7) =13a(8) =17a(9) =19a(10) =19a(11) =23a(12) =23a(13) =23a(14) =29a(15) =31a(16) =31a(17) =31a(18) =37a(19) =37a(20) =41a(21) =43a(22) =43a(23) =47a(24) =47a(25) =47a(26) =53a(27) =53a(28) =53a(29) =59