User blog comment:Hyp cos/Idea for legion/@comment-29014792-20160818104707

Here is my idea:

X^^2X[A] = X^X^...^X^X^(X^^X+1) with A Xs before X^^X

X^^^X[A] = X^^X^^...^^X^^X with A Xs

{X,2X,X}[A] = {X,{X,X,X}+1,A}

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