Primes of the form 4^x + y^4 with x, y > 0.

Terms

a(0) =5a(1) =17a(2) =97a(3) =257a(4) =337a(5) =641a(6) =881a(7) =2417a(8) =2657a(9) =4177a(10) =4721a(11) =6577a(12) =10657a(13) =14657a(14) =14897a(15) =28817a(16) =54721a(17) =65537a(18) =65617a(19) =66161a(20) =80177a(21) =83537a(22) =83777a(23) =130337a(24) =134417a(25) =149057a(26) =260017a(27) =279857a(28) =280097a(29) =283937