Akm = {{3, 0, A(3,0)} , 
       {3,-1, (-1)*(A(3,1))} , 
       {3, 1, A(3,1)} , 
       {3,-2, A(3,2)} , 
       {3, 2, A(3,2)} , 
       {3,-3, (-1)*(A(3,3))} , 
       {3, 3, A(3,3)} }