
    Design a function that calculates the total complexity score of a student's learning journey by summing the squared difficulty ratings of sequential assessment checkpoints, where each checkpoint is represented by consecutive odd numbers starting from 1. The function should take the number of checkpoints as input and help educators quantify the cumulative cognitive load a student experiences as they progress through increasingly challenging material.
    

    
def square_Sum(n):
    """
    Design a function that calculates the total complexity score of a student's learning journey by summing the squared difficulty ratings of sequential assessment checkpoints, where each checkpoint is represented by consecutive odd numbers starting from 1. The function should take the number of checkpoints as input and help educators quantify the cumulative cognitive load a student experiences as they progress through increasingly challenging material.
    

    """
def square_Sum(n):
    """
    Design a function that calculates the total complexity score of a student's learning journey by summing the squared difficulty ratings of sequential assessment checkpoints, where each checkpoint is represented by consecutive odd numbers starting from 1. The function should take the number of checkpoints as input and help educators quantify the cumulative cognitive load a student experiences as they progress through increasingly challenging material.
    

    """
    return int(n * (4 * n * n - 1) / 3)