User blog comment:Mh314159/Question about growth rate/@comment-35470197-20191107005001/@comment-43798125-20191107113347

To reach limit ordinals beyond f_w^2 (or any ordinal for that matter) you cannot just iterate a constant amount of times. For instance, for reaching f_(w^2)2 you need to do the whole thing that brought you from 0 to w^2 again