[0,0,2,0,3,3,0,4,6,4,0,5,10,10,5,0,6,15,20,15,6,0, 7,21,35,35,21,7,0,8,28,56,70,56,28,8,0,9,36,84, 126,126,84,36,9,0,10,45,120,210,252,210,120,45,10, 0,11,55,165,330,462]