Smallest prime factor of n^n + 1.

Terms

a(0) =2a(1) =5a(2) =2a(3) =257a(4) =2a(5) =13a(6) =2a(7) =97a(8) =2a(9) =101a(10) =2a(11) =89a(12) =2a(13) =29a(14) =2a(15) =274177a(16) =2a(17) =5a(18) =2a(19) =148721a(20) =2a(21) =5a(22) =2a(23) =17a(24) =2a(25) =53a(26) =2a(27) =449a(28) =2a(29) =17