Primes of form x^y + y^x + 1.

Terms

a(0) =3a(1) =5a(2) =7a(3) =11a(4) =13a(5) =17a(6) =19a(7) =23a(8) =29a(9) =31a(10) =37a(11) =41a(12) =43a(13) =47a(14) =101a(15) =2531a(16) =4241a(17) =5393a(18) =94933a(19) =262469a(20) =16797953a(21) =48989177a(22) =78371693633