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Counting brackets (Posted on 2017-01-03) Difficulty: 2 of 5
In how many ways can one insert n pairs of parentheses in a word of n+1 letters?

Not allowed: empty parentheses, such as a()b, or redundant parentheses such as in a((b))c.

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
Solutioncomputer exploration and solutionCharlie2017-01-03 15:22:32
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