
    Design a function that calculates the total number of interconnected learning objectives a student needs to master at their nth progression level, where learning objectives are organized in a centered hexagonal pattern with each level building upon previous achievements. The number of objectives follows the centered hexagonal number sequence, ensuring comprehensive coverage of all dependent skills at each educational milestone.
    

    
def centered_hexagonal_number(n):
    """
    Design a function that calculates the total number of interconnected learning objectives a student needs to master at their nth progression level, where learning objectives are organized in a centered hexagonal pattern with each level building upon previous achievements. The number of objectives follows the centered hexagonal number sequence, ensuring comprehensive coverage of all dependent skills at each educational milestone.
    

    """
def centered_hexagonal_number(n):
    """
    Design a function that calculates the total number of interconnected learning objectives a student needs to master at their nth progression level, where learning objectives are organized in a centered hexagonal pattern with each level building upon previous achievements. The number of objectives follows the centered hexagonal number sequence, ensuring comprehensive coverage of all dependent skills at each educational milestone.
    

    """
    return 3 * n * (n - 1) + 1