If you have stumbled across the search term or "nxnxn rubik cube link" , you are likely standing at the edge of a deep rabbit hole. While the "xnxnxnxn" notation looks like a typo or a string of keyboard smashing, in the cubing community, it points to a very specific concept: the generalized N×N×N Rubik’s Cube.
: This research paper by Erik Demaine and colleagues discusses the algorithmic structure of the xnxnxnxn cube algorithms pdf nxnxn rubik cube link