三角形开头为:
[0] [1]
[1] [2, 1]
[2] [8, 4, 1]
[3] [32, 20, 6, 1]
[4] [144, 96, 36, 8, 1]
[5] [672, 480, 200, 56, 10, 1]
[6] [3264, 2432, 1104, 352, 80, 12, 1]
[7] [16256, 12544, 6048, 2128, 560, 108, 14, 1]
[8] [82688, 65536, 33152, 12544, 3680, 832, 140, 16, 1]