[1,1,1,1,4,1,1,9,9,1,1,8,12,8,1,1,15,20,20,15,1,1, 12,45,40,45,12,1,1,21,63,105,105,63,21,1,1,16,56, 112,140,112,56,16,1,1,27,72,168,252,252,168,72,27, 1,1,20,135,240,420,504,420,240,135,20,1]