[1,1,2,1,4,2,1,6,6,2,1,8,12,8,2,1,10,20,20,10,2,1, 12,30,40,30,12,2,1,14,42,70,70,42,14,2,1,16,56, 112,140,112,56,16,2,1,18,72,168,252,252,168,72,18, 2,1,20,90,240,420,504,420,240,90,20,2,1,22,110, 330,660,924,924,660,330,110,22,2]