User blog comment:Primussupremus/Factorial summation tree function/@comment-31390121-20170322085354

h10=1!*2!*3!*4!*5!*6!*7!*8!*9!*10!=6.658606584105 × 10^27 so its a tad bit smaller than 10!10. h10^h10 is just exponentiation the reason for it being so weak at the start is because I want this function to grow faster and faster the higher up in the Hierarchy you go.