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Which of the following numbers is the 6th Catalan number? - Practice - ObjectiveMcq

Which of the following numbers is the 6th Catalan number?

Correct Answer: D — 42

Catalan numbers are given by: (2n!)/((n+1)!n!).

First Catalan number is given by n = 0.

So the 6th Catalan number will be given by n = 5, which is 42.

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