Numbers of the form a^b+b^a, a and b are primes.

Terms

a(0) =8a(1) =17a(2) =54a(3) =57a(4) =177a(5) =368a(6) =2169a(7) =2530a(8) =6250a(9) =8361a(10) =94932a(11) =131361a(12) =178478a(13) =524649a(14) =1596520a(15) =1647086a(16) =8389137a(17) =48989176a(18) =129145076a(19) =536871753a(20) =1162268326a(21) =1221074418a(22) =1996813914a(23) =2147484609a(24) =94143190994a(25) =96951758924a(26) =137438954841