
    At a busy urban intersection, traffic engineers need to predict the volume of vehicles for the n'th traffic signal cycle using a Lucas sequence pattern that has emerged from historical traffic data analysis. Write a function that calculates this n'th traffic volume prediction value, where each number in the sequence is the sum of the two preceding values, starting with base values of 2 and 1.
    

    
def find_lucas(n):
    """
    At a busy urban intersection, traffic engineers need to predict the volume of vehicles for the n'th traffic signal cycle using a Lucas sequence pattern that has emerged from historical traffic data analysis. Write a function that calculates this n'th traffic volume prediction value, where each number in the sequence is the sum of the two preceding values, starting with base values of 2 and 1.
    

    """
def find_lucas(n):
    """
    At a busy urban intersection, traffic engineers need to predict the volume of vehicles for the n'th traffic signal cycle using a Lucas sequence pattern that has emerged from historical traffic data analysis. Write a function that calculates this n'th traffic volume prediction value, where each number in the sequence is the sum of the two preceding values, starting with base values of 2 and 1.
    

    """
    if n == 0:
        return 2
    if n == 1:
        return 1
    return find_lucas(n - 1) + find_lucas(n - 2)