Prime terms of A338820.

Terms

a(0) =61a(1) =449a(2) =661a(3) =1987a(4) =7583a(5) =7817a(6) =8431a(7) =8779a(8) =9677a(9) =11003a(10) =11311a(11) =13033a(12) =18311a(13) =28411a(14) =44449a(15) =46327a(16) =72901a(17) =79153a(18) =89599a(19) =100403a(20) =101581a(21) =127423a(22) =148861a(23) =169789a(24) =207511a(25) =214657a(26) =287503a(27) =308303a(28) =333493a(29) =326251