def quadratic_item_score(i):
    """Function is similar to inverted and linear functions but weights are decreasing at non-linear rate
       and accelerate with the item position.

    Parameters
    ----------
    i : int
        Item position.

    Returns
    -------
    result : float
             Inverted square position rank.
    """
    result = 1 / (i * i)
    return result