
    Given a patient's medical profile with n distinct health indicators (including symptoms, conditions, and risk factors), determine the total number of unique ways these indicators can be grouped into risk assessment categories to evaluate potential readmission pathways. Each health indicator must be assigned to exactly one category, and empty categories are not allowed in the final assessment model.
    

    
def bell_number(n):
    """
    Given a patient's medical profile with n distinct health indicators (including symptoms, conditions, and risk factors), determine the total number of unique ways these indicators can be grouped into risk assessment categories to evaluate potential readmission pathways. Each health indicator must be assigned to exactly one category, and empty categories are not allowed in the final assessment model.
    

    """
def bell_number(n):
    """
    Given a patient's medical profile with n distinct health indicators (including symptoms, conditions, and risk factors), determine the total number of unique ways these indicators can be grouped into risk assessment categories to evaluate potential readmission pathways. Each health indicator must be assigned to exactly one category, and empty categories are not allowed in the final assessment model.
    

    """
    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]