
    In a city's hexagonal zone-based delivery system, calculate the total number of possible delivery points that can be serviced within the nth zone of coverage, where each new zone expands outward in a hexagonal pattern from the central hub. The number of serviceable delivery points follows the hexagonal number sequence, ensuring optimal coverage and route distribution for the fleet.
    

    
def hexagonal_num(n):
    """
    In a city's hexagonal zone-based delivery system, calculate the total number of possible delivery points that can be serviced within the nth zone of coverage, where each new zone expands outward in a hexagonal pattern from the central hub. The number of serviceable delivery points follows the hexagonal number sequence, ensuring optimal coverage and route distribution for the fleet.
    

    """
def hexagonal_num(n):
    """
    In a city's hexagonal zone-based delivery system, calculate the total number of possible delivery points that can be serviced within the nth zone of coverage, where each new zone expands outward in a hexagonal pattern from the central hub. The number of serviceable delivery points follows the hexagonal number sequence, ensuring optimal coverage and route distribution for the fleet.
    

    """
    return n * (2 * n - 1)