Hey you recently posted an Scp concept that sounded familiar, so I found a couple that were related to it
First there’s scp-7777, which works the closest to your idea
I also found scp-4559 which uses the choice to accept a receipt at a store or not as a rng
And there’s scp-Y, an anomalous finite set of every mathematical number that does not exist
Hope these were kinda what you were looking for :)
(in reference to this post here)
They mostly aren't, but my immediate thought on seeing that last one was that there needed to be a joke version of it called "SCP-J".











