I can get
1 2 3
4 5 6
7
in a 7-page document. (Page 7 is also in the middle.)

This is likely not what you want. It is with 51% zoom and I can't read it on my laptop.

Further, it is not that you see the pages before and after when you are working on one in the middle, unless the one you are working on is 2 or 5.