Well I have found that there are 2*2+1 = 9 states which are |2, 2>, |2, 1>, |2, 0>, |2, -1>, |2, -2>, |1, 1>, |1, 0>, |1, -1>, |0, 0>.
In 'big O' notation,
1X1 = 2+1+0+|-1|+|-2|
3*3 = 9
So these seem to be all the possible states. I'm not sure if it means I have found all the states. I'm...