Yup, you can clone the clones as many times as you would like if you follow the proper procedure (it's in my sig, among other places).
Wait until the plant has several growing tips before taking cuts. At 3.5 weeks, this is a good time to pinch the very top of the plant so that it makes side shoots and stays short and bushy. Then in a couple weeks you can take a few side shoots to use as clones.