User blog comment:Antares.I.G.Harrison/Hello guys/@comment-26084716-20151129090632/@comment-25601061-20151208191221

It isn't. There is actually a difference between BEAF and this notation.

Until 3 entries, we have {a,b,c} equal to [a,b,c]. But then, the growth rate of [a,b,c,...,x,y,z] (A entries) (A is bigger than 3) has similar growth rate of {a,b,A-3,2}. This is also similar to Googology Noob's GoogolX notation.