Smallest prime factor of n! + 2n - 1.

Terms

a(0) =2a(1) =5a(2) =11a(3) =31a(4) =3a(5) =17a(6) =31a(7) =3a(8) =362897a(9) =3628819a(10) =3a(11) =251a(12) =5a(13) =3a(14) =93407a(15) =200989a(16) =3a(17) =5a(18) =211a(19) =3a(20) =199a(21) =38189a(22) =3a(23) =314707a(24) =7a(25) =3a(26) =2473a(27) =5a(28) =3a(30) =1447