
    In a city's hexagonal zone-based delivery system, where each zone level expands outward to include more delivery points, calculate the total number of delivery points that can be serviced within the nth zone level. Each new zone level follows a hexagonal pattern, encompassing all inner zones, to help optimize route planning and coverage areas.
    

    
def hexagonal_num(n):
    """
    In a city's hexagonal zone-based delivery system, where each zone level expands outward to include more delivery points, calculate the total number of delivery points that can be serviced within the nth zone level. Each new zone level follows a hexagonal pattern, encompassing all inner zones, to help optimize route planning and coverage areas.
    

    """
def hexagonal_num(n):
    """
    In a city's hexagonal zone-based delivery system, where each zone level expands outward to include more delivery points, calculate the total number of delivery points that can be serviced within the nth zone level. Each new zone level follows a hexagonal pattern, encompassing all inner zones, to help optimize route planning and coverage areas.
    

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