
    Design a function that calculates the total number of possible ways to organize learning concepts into different study sequences, where each concept must be included exactly once and can be grouped with any other concepts to form coherent learning paths. Given n learning concepts, determine how many unique ways these concepts can be partitioned into groups to create different personalized learning sequences.
    

    
def bell_number(n):
    """
    Design a function that calculates the total number of possible ways to organize learning concepts into different study sequences, where each concept must be included exactly once and can be grouped with any other concepts to form coherent learning paths. Given n learning concepts, determine how many unique ways these concepts can be partitioned into groups to create different personalized learning sequences.
    

    """
def bell_number(n):
    """
    Design a function that calculates the total number of possible ways to organize learning concepts into different study sequences, where each concept must be included exactly once and can be grouped with any other concepts to form coherent learning paths. Given n learning concepts, determine how many unique ways these concepts can be partitioned into groups to create different personalized learning sequences.
    

    """
    bell = [[0 for i in range(n + 1)] for j in range(n + 1)]
    bell[0][0] = 1
    for i in range(1, n + 1):
        bell[i][0] = bell[i - 1][i - 1]
        for j in range(1, i + 1):
            bell[i][j] = bell[i - 1][j - 1] + bell[i][j - 1]
    return bell[n][0]