1         329         729
  1  0
  1  1
  1  2
  0  2
 -1  2
 -1  1
  0  1
           2         502         729
  1  0
  1 -1
  1 -2
  0 -2
 -1 -2
 -1 -1
  0 -1
ITRAP:           2 IPATH:         543
PROB = 1/     364.500000000000000
         729           2