a(n) = least 2k such that p is the least prime in a Goldbach partition of 2k, where p = prime(n).

Terms

a(0) =4a(1) =6a(2) =12a(3) =30a(4) =124a(5) =122a(6) =418a(7) =98a(8) =220a(9) =346a(10) =308a(11) =1274a(12) =1144a(13) =962a(14) =556a(15) =2512a(16) =3526a(17) =1382a(18) =1856a(19) =4618a(20) =992a(21) =3818a(22) =7432a(23) =12778a(24) =5978a(25) =26098a(26) =2642a(27) =23266a(28) =10268a(29) =19696