三角形开头为:
0;
6, 6;
23, 60, 23;
56, 208, 208, 56;
109, 496, 713, 496, 109;
184, 968, 1696, 1696, 968, 184;
279, 1664, 3311, 4032, 3311, 1664, 279;
384, 2616, 5704, 7872, 7872, 5704, 2616, 384;
473, 3840, 9005, 13568, 15369, 13568, 9005, 3840, 473;
488, 5320, 13312, 21440, 26488, 26488, 21440, 13312, 5320, 488;