What is the value of the 4th Catalan number C4C_4C4 defined by Cn=∑i=0n−1CiCn−1−iC_n = \sum_{i=0}^{n-1} C_i C_{n-1-i}Cn=∑i=0n−1CiCn−1−i with C0=1C_0 = 1C0=1?
141414
555
424242
282828