#          n      solns      first        all  estimated      sigma      brute
           5          0          0          0       55.6      2.314       3125
          10          0          0          0  3.588e+04       3526      1e+10
          15          0          0          0  1.648e+08  3.691e+07  4.379e+17
          20          0          0          0  3.852e+12  1.066e+12  1.049e+26
          25          0          0          0  2.996e+17  1.267e+17  8.882e+34
          30          0          0          0  5.772e+22   2.31e+22  2.059e+44