[1,1,2,4,12,36,108,324,1296,5184,20736,82944, 331776,1327104,5308416,21233664,106168320, 530841600,2654208000,13271040000,66355200000, 331776000000,1658880000000,8294400000000, 41472000000000,207360000000000,1036800000000000, 5184000000000000]