%I #10 Nov 21 2013 12:47:07

%S 2,8,32768,40564819207303340847894502572032

%N a(1) = 2, a(n) = a(n-1)^prime(n) for n > 1.

%e a(3)=32768 because (2^3)^5=32768.

%t RecurrenceTable[{a[1]==2,a[n]==a[n-1]^Prime[n]},a[n],{n,4}] (* _Harvey P. Dale_, Jul 18 2011 *)

%o (PARI) a(n)=if(n<2,1,a(n-1)^prime(n)) \\ _Charles R Greathouse IV_, Jun 20 2013

%K nonn,nice

%O 1,1

%A _Felice Russo_