User blog comment:Boboris02/Boris´s sezration notation/@comment-29014792-20161001215423/@comment-29014792-20161002205315

[a||b||a] expands to [a|[a|[...a|[b]|a...]|a]|a], because of nests |, this level have growth rate w^2+3.


 * do the same as nests ||, and have the growth w^2+4


 * have the growth rate w^2+5

....

§ dominates all of |s and have the growth rate w^2+w.