User blog comment:PsiCubed2/Letter Notation Part III/@comment-27513631-20161225231717/@comment-30754445-20171108131333

You've probably meant I2 (I1 in your version would just be 10, just like E1=F1=G1=H1=10)

At any rate, why on earth would I want to go there, where my J already grows much faster than your "Z"?