Smallest n-th power starting with 5.

Terms

a(0) =5a(1) =529a(2) =512a(3) =50625a(4) =59049a(5) =531441a(6) =52523350144a(7) =5764801a(8) =512a(9) =59049a(11) =531441a(12) =549755813888