Ononot — The recurrence Cn = \sum{k=0}^{n-1} Ck C{n-1-k} with C0 = 1

Recursionhard

0:00.0

The recurrence $C_n = \sum_{k=0}^{n-1} C_k C_{n-1-k}$ with $C_0 = 1$ defines the Catalan numbers. Which of the following is NOT satisfied by this sequence?