Smallest prime of the form k^n-2.

Terms

a(0) =2a(1) =2a(2) =727a(3) =79a(4) =241a(5) =727a(6) =823541a(7) =5764799a(8) =19681a(10) =31381059607a(11) =13841287199a(13) =6103515623