User blog comment:Eners49/New Notation Idea?/@comment-2601:142:2:EC49:84E3:14C4:34DB:5371-20180623154511/@comment-2601:142:2:EC49:755A:1A23:F930:1137-20180624125714

Oh yeah, definitely. [n] is ALREADY bigger than gn, and [x, y] makes Graham's function look like a pebble!