1 1  0.00113925 

     2 2  0.001390393 

     3 3  0.00113369 

     4 4  0.001611037 

     5 5  0.00320043 

     6 6  0.004299621 

     7 7  0.009503939 

     8 8  0.012337418 

     9 9  0.028872115 

    10 10  0.078161428 

    11 11  0.147121003 

    12 12  0.241872536 

    13 13  0.546760917 

    14 14  1.241357992 

    15 15  2.935996717 

    16 16  6.732515184 

    17 17  15.095000451 

    18 18  33.060935265 

    19 19  74.823744749