
    Given a transit vehicle's inspection sequence number, calculate the total number of sensor data points that need to be analyzed during that maintenance interval, where sensors are arranged in a centered hexagonal pattern that expands with each subsequent inspection (starting with 1 point and following the centered hexagonal number sequence). The sensor coverage pattern follows a systematic expansion where each new inspection layer adds an outer ring of measurement points around the previous pattern.
    

    
def centered_hexagonal_number(n):
    """
    Given a transit vehicle's inspection sequence number, calculate the total number of sensor data points that need to be analyzed during that maintenance interval, where sensors are arranged in a centered hexagonal pattern that expands with each subsequent inspection (starting with 1 point and following the centered hexagonal number sequence). The sensor coverage pattern follows a systematic expansion where each new inspection layer adds an outer ring of measurement points around the previous pattern.
    

    """
def centered_hexagonal_number(n):
    """
    Given a transit vehicle's inspection sequence number, calculate the total number of sensor data points that need to be analyzed during that maintenance interval, where sensors are arranged in a centered hexagonal pattern that expands with each subsequent inspection (starting with 1 point and following the centered hexagonal number sequence). The sensor coverage pattern follows a systematic expansion where each new inspection layer adds an outer ring of measurement points around the previous pattern.
    

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