User blog comment:Forthright/QUICK QUESTION/@comment-37224188-20191026010624/@comment-39541634-20191030074531

It's (n-1) w's. So f_e0(8) will expand to 7 omegas, rather 8.

In the grand scheme of things, though, it doesn't really matter. We could have defined f_e0(n) to expand into n omegas if we wanted to.