ObjectiveMcq
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Which of the following is NOT a Catalan number?
Correct Answer: D — 43
Catalan numbers are given by: (2n!)/((n+1)!n!).
For n = 0, we get C0 = 1.
For n = 3, we get C3 = 5.
For n = 4, we get C4 = 14.
For n = 5, we get C3 = 42.