
    Design a function that determines the total number of potential fraud-linked transactions to analyze at a given depth level n in the bank's transaction pattern analysis system, where each deeper level forms a tetrahedral relationship pattern with transactions above it. The number of interconnected transactions follows a tetrahedral pattern, where level n includes all transaction relationships from previous levels plus new connections formed at the current level.
    

    
def tetrahedral_number(n):
    """
    Design a function that determines the total number of potential fraud-linked transactions to analyze at a given depth level n in the bank's transaction pattern analysis system, where each deeper level forms a tetrahedral relationship pattern with transactions above it. The number of interconnected transactions follows a tetrahedral pattern, where level n includes all transaction relationships from previous levels plus new connections formed at the current level.
    

    """
def tetrahedral_number(n):
    """
    Design a function that determines the total number of potential fraud-linked transactions to analyze at a given depth level n in the bank's transaction pattern analysis system, where each deeper level forms a tetrahedral relationship pattern with transactions above it. The number of interconnected transactions follows a tetrahedral pattern, where level n includes all transaction relationships from previous levels plus new connections formed at the current level.
    

    """
    return n * (n + 1) * (n + 2) / 6