User blog comment:DrCeasium/new hyperfactorial array notation/@comment-5529393-20130416153852/@comment-5529393-20130416194756

Okay, so if the first entry is greater than 1 (whether in a nested array or not), you decrement it by 1 and iterate it n times, correct? I think I get it.

Well, now I am trying to understand your planar arrays. You say that

3![1,1;1,2]   = 3![1,1;[1,1;[1,1;[1,1;[1,1;1,1],1],1],1],1]

But why five nestings?