User blog comment:Ynought/Extended array hierarchy/@comment-35470197-20190117222337/@comment-35470197-20190122143023

> \(I_n\)

How many \((n+I_{n-1})\)'s in the arrays? 10?

> \((a+I_a,\ldots,b+I_b)\)

What is abbreviated between \(a+I_a\) and \(b+I_b\)?

> \((c+I_c,d+I_d,\ldots,e-1) \cdots\)

What are abbreviated between \(d+I_d\) and \(e-1\) and after \(e-1\)?

Well, it is better to avoid omitting entries in those ambiguous cases.