If   1 ((2 3)) is valid, then what about   1 (((2 3))) ? If that's valid, then you have a countably infinite number of possible permutations. I kinda doubt the problem is phrased to allow that.


Update: D'oh. So that's what p= means.

In reply to Re: Parens permutations by dws
in thread Parens permutations by artist

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