User blog comment:Eners49/The secret 0th hyper-operator?/@comment-2601:142:2:EC49:A496:CA1D:3DA2:B5DD-20180728144329/@comment-162.238.217.96-20180728152021

How about {x,y,z} for ? examples {x,y,z} = x{z}y where z is equal to z ?'s {3,3,3} = 3???3 {3,3,2} = 3??3 {3,3,1} = 3?3 {3,3,#} = 3???3 {3,4,#} = 3????4 {x,y,1,2} = equals y nests of x {3,3,1,2} = 3{3{3}3}3 with ?s instead of ^s