def _compute_n_j_plus_one(one_over_delta_grid,
    one_over_delta_grid_bar_forward, C_forward, B_forward, one_minus_delta_j):
    """
    equation for the CC n_j +1 term

    :param one_over_delta_grid: the total change in energy
    :param one_over_delta_grid_bar_backward: the backward change in energy for the second derivative
    :param C_forward: the forward dispersion term
    :param B_forward: the forward heating term
    :param one_minus_delta_j: 1 - delta_j
    """
    return one_over_delta_grid * (one_minus_delta_j * B_forward + 
        one_over_delta_grid_bar_forward * C_forward)
