Off topic ish, but have you ever read into 52 factorial/52! ?
It's the number of ways a deck of cards can be shuffled. 52x51x50... and so on. It is an almost inexpressibly large number. There is a description on link below of how huge a number it is, but by all laws of probability, every time you shuffle a deck of cards, you are creating a sequence that has never been created before.
More here:
https://czep.net/weblog/52cards.htmlAnd yeah, Solitaire probably is a roguelike by those definitions. I've been playing a lot of it recently.