[1,-3,3,-3,6,-9,12,-15,21,-30,36,-45,60,-78,96, -117,150,-189,228,-276,342,-420,504,-603,732,-885, 1050,-1245,1488,-1773,2088,-2454,2901,-3420,3996, -4662,5460,-6378,7404,-8583,9972,-11565,13344, -15378,17748,-20448]