Akm = {{0, 0, (1/5)*(Ea1g + (2)*(Ee1g + Ee2g))} , 
       {2, 0, Ea1g + Ee1g + (-2)*(Ee2g)} , 
       {4, 0, (3/5)*((3)*(Ea1g) + (-4)*(Ee1g) + Ee2g)} }