Primes of the form 2*n^4-1.

Terms

a(0) =31a(1) =1249a(2) =2591a(3) =4801a(4) =8191a(5) =13121a(6) =76831a(7) =131071a(8) =388961a(9) =1062881a(10) =1229311a(11) =2672671a(12) =6223391a(13) =7496191a(14) =9759361a(15) =10616831a(16) =12499999a(17) =13530401a(18) =29552671a(19) =31505921a(20) =35701249a(21) =42762751a(22) =48019999a(23) =63281249a(24) =66724351a(25) =77900161a(26) =90424351a(27) =99574271a(28) =149610401