Greatest prime factor of prime(n)^n - 1.

Terms

a(0) =2a(1) =31a(2) =5a(3) =3221a(4) =157a(5) =25646167a(6) =3833a(7) =7792003a(8) =732541a(9) =150332843a(10) =144061a(11) =17615988547a(12) =6177695707a(13) =461017351a(16) =903870199a(18) =25058741a(19) =153436090543