User blog comment:Eners49/New Notation Idea? (Attempt 2)/@comment-36170619-20180715041151

When you say a!!!...!!!, do you mean just that or ((((...(((a)!)!)!)...)!)!)!) ? Because those are two different things.

An example of this is is 12!! and ((12)!)!: 12!! would actually just be 12*9*6*3, but ((12)!)! would be the factorial of the factorial of 12, or the factorial of 479001600.

Contrary, I do think you mean ((((...(((a)!)!)!)...)!)!)!).