Largest prime factor of n^4 + 1.

Terms

a(0) =2a(1) =17a(2) =41a(3) =257a(4) =313a(5) =1297a(6) =1201a(7) =241a(8) =193a(9) =137a(10) =7321a(11) =233a(12) =14281a(13) =937a(14) =1489a(15) =65537a(16) =41761a(17) =929a(18) =3833a(19) =160001a(20) =97241a(21) =3209a(22) =139921a(23) =331777a(24) =11489a(25) =26881a(26) =6481a(27) =614657a(28) =353641a(29) =3361