Smaller of two successive 4th powers whose sum is a prime.

Terms

a(0) =1a(1) =16a(2) =81a(3) =256a(4) =1296a(5) =4096a(6) =6561a(7) =20736a(8) =28561a(9) =38416a(10) =65536a(11) =390625a(12) =456976a(13) =531441a(14) =923521a(15) =1185921a(16) =1336336a(17) =1679616a(18) =1874161a(19) =2085136a(20) =2560000a(21) =3418801a(22) =5308416a(23) =8503056a(24) =15752961a(25) =20151121a(26) =21381376a(27) =26873856a(28) =29986576a(29) =37015056