User blog comment:Wythagoras/FGH Dollars Function/@comment-10429372-20130710181242/@comment-5529393-20130710182341

I don't know, your array notation starts growing more slowly than the Extended Veblen notation - [0, 0, 0, 1] is less than phi(1, 0, 0, 0) - but suddenly it accelerates and goes way, way past Extended Veblen notation. Something seems wrong to me.

The questionable part seems to be [0, 0, 0, [0, 0, 0, 1]_n ] ~ psi(Omega^Omega^n)