三角形开头为:
三;
5, 5;
9, 27, 9;
17, 102, 102, 17;
33, 330, 660, 330, 33;
65, 975, 3250, 3250, 975, 65;
129, 2709, 13545, 22575, 13545, 2709, 129;
257, 7196, 50372, 125930, 125930, 50372, 7196, 257;
513, 18468, 172368, 603288, 904932, 603288, 172368, 18468, 513;
1025, 46125, 553500, 2583000, 5424300, 5424300, 2583000, 553500, 46125, 1025;