View Compilation Error

0_0_26025708_629.cpp: In function 'int main()':
0_0_26025708_629.cpp:9:38: error: expected primary-expression before 'double'
 cout << fixed << setprecision(0) << (double) << pow(2,n) << endl;
                                      ^
0_0_26025708_629.cpp:9:38: error: expected ')' before 'double'