Akm = {{2, 0, A(2,0)} , 
       {2,-2, A(2,2)} , 
       {2, 2, A(2,2)} , 
       {4, 0, A(4,0)} , 
       {4,-2, A(4,2)} , 
       {4, 2, A(4,2)} , 
       {4,-4, A(4,4)} , 
       {4, 4, A(4,4)} }