public void Coupling3jTest()
        {
            object ret = null;

            foreach (var d1 in Xsmall)
            {
                foreach (var d2 in Xsmall)
                {
                    foreach (var d3 in Xsmall)
                    {
                        foreach (var d4 in Xsmall)
                        {
                            foreach (var d5 in Xsmall)
                            {
                                foreach (var d6 in Xsmall)
                                {
                                    try
                                    {
                                        ret = SpecialFunctions.Coupling3j(d1, d2, d3, d4, d5, d6);
                                    }
                                    catch (Exception ex)
                                    {
                                        Assert.Fail("Exception occured: " + ex);
                                    }
                                    Assert.IsNotNull(ret);
                                }
                            }
                        }
                    }
                }
            }
        }