
    Design a function to determine the number of different ways medical staff can organize patient vital sign parameters into distinct alert categories, where each parameter must be assigned to exactly one category and empty categories are not allowed. Given n vital sign parameters that need monitoring, calculate all possible grouping arrangements to ensure comprehensive patient monitoring coverage.
    

    
def bell_number(n):
    """
    Design a function to determine the number of different ways medical staff can organize patient vital sign parameters into distinct alert categories, where each parameter must be assigned to exactly one category and empty categories are not allowed. Given n vital sign parameters that need monitoring, calculate all possible grouping arrangements to ensure comprehensive patient monitoring coverage.
    

    """
def bell_number(n):
    """
    Design a function to determine the number of different ways medical staff can organize patient vital sign parameters into distinct alert categories, where each parameter must be assigned to exactly one category and empty categories are not allowed. Given n vital sign parameters that need monitoring, calculate all possible grouping arrangements to ensure comprehensive patient monitoring coverage.
    

    """
    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]