Largest prime factor of n^2 + 1.

Terms

a(0) =2a(1) =5a(2) =5a(3) =17a(4) =13a(5) =37a(6) =5a(7) =13a(8) =41a(9) =101a(10) =61a(11) =29a(12) =17a(13) =197a(14) =113a(15) =257a(16) =29a(17) =13a(18) =181a(19) =401a(20) =17a(21) =97a(22) =53a(23) =577a(24) =313a(25) =677a(26) =73a(27) =157a(28) =421a(29) =53