ctbl:=[ [ 1, 2, 1575, 3150, 22400, 44800, 113400 ], [ 1, -1, 315, -315, 2240, -2240, 0 ], [ 1, 2, 171, 342, -64, -128, -324 ], [ 1, 2, -9, -18, 224, 448, -648 ], [ 1, 2, -9, -18, -64, -128, 216 ], [ 1, -1, -45, 45, 80, -80, 0 ], [ 1, -1, 27, -27, -64, 64, 0 ] ];