# Write a python function to find sum of product of binomial co-efficients.
def binomial_Coeff(n, k):
    C = [0] * (k + 1)
    C[0] = 1
    # nC0 is 1
    for i in range(1, n + 1):
        for j in range(min(i, k), 0, -1):
            C[j] = C[j] + C[j - 1]
    return C[k]


def sum_Of_product(n):
    return binomial_Coeff(2 * n, n - 1)
