
    Given n distinct vital sign parameters from a patient monitoring system, determine the number of different ways these parameters can be grouped together to form distinct complication pattern sets, where each parameter must be included in exactly one group and empty groups are not allowed. For example, if monitoring blood pressure, heart rate, and temperature (n=3), find all possible ways to organize these parameters into meaningful clinical correlation groups.
    

    
def bell_number(n):
    """
    Given n distinct vital sign parameters from a patient monitoring system, determine the number of different ways these parameters can be grouped together to form distinct complication pattern sets, where each parameter must be included in exactly one group and empty groups are not allowed. For example, if monitoring blood pressure, heart rate, and temperature (n=3), find all possible ways to organize these parameters into meaningful clinical correlation groups.
    

    """
def bell_number(n):
    """
    Given n distinct vital sign parameters from a patient monitoring system, determine the number of different ways these parameters can be grouped together to form distinct complication pattern sets, where each parameter must be included in exactly one group and empty groups are not allowed. For example, if monitoring blood pressure, heart rate, and temperature (n=3), find all possible ways to organize these parameters into meaningful clinical correlation groups.
    

    """
    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]