Is there a quick way to get the game to roll a bunch of d20s and export the values?
I could be wrong, but I *think* Niara reloaded and rerolled each time, and wrote the value down each time. This is pretty tedious, and that's why there are only 200 entries.
Well, if the numbers come from reloading, then the analysis might not stand up to scrutiny, as you may be resetting the RNG each time, and there is no guarantee that RNG seeds in a random way.
You need to take a sequence within the context of the game, which may well be awkward if looking for patterns, as you do not know when the RNG is used by the game without you seeing the results.
Having said that, any arbitrarily sampled set of rolls within the game should exhibit randomness.