
    Write a function that calculates a student's total achievement score across their learning journey, where the score for each milestone is determined by squaring its difficulty level (represented by consecutive odd numbers), and the student must complete n progressive milestones. The total achievement score helps educators assess the student's mastery of increasingly complex concepts and determines their readiness for advanced material.
    

    
def square_Sum(n):
    """
    Write a function that calculates a student's total achievement score across their learning journey, where the score for each milestone is determined by squaring its difficulty level (represented by consecutive odd numbers), and the student must complete n progressive milestones. The total achievement score helps educators assess the student's mastery of increasingly complex concepts and determines their readiness for advanced material.
    

    """
def square_Sum(n):
    """
    Write a function that calculates a student's total achievement score across their learning journey, where the score for each milestone is determined by squaring its difficulty level (represented by consecutive odd numbers), and the student must complete n progressive milestones. The total achievement score helps educators assess the student's mastery of increasingly complex concepts and determines their readiness for advanced material.
    

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