Bry: I understand it is completely random.
The bad thing is that it's too random. Almost never things get wild (to have a 66, 2 consecutive times and then 2 44). The expected distribution of all 21 rolls has a very short period.
I mean if you take, even 6·36 = 216 rolls, then the odds for each of the 21 possible rolls, will be almost the same with the theoretical. I would prefer a large value of 200·36 = 7200 rolls, to be each different roll near on the theoretical value..........