User blog comment:Simplicityaboveall/The Construction of Extremely Large Numbers/@comment-25601061-20160725202417/@comment-25912386-20160728162247

I said that this is a modified version of the FGH. There is nothing which prevents you from definning f (0,n) as 10n. We can define many many different kinds of fast-growing hierarchies. You are not obliged to start with " n + 1 ". Take care Alemagno12 !