符号付偶数交点数列 { 24,10,20,30,16,26,6,22,2,12,28,8,18,4,14 } 射影交点座標 { (R,-54,0,0), (r,18,0,0), (2r,90+36,0,0), (R,-90-36,0,0), (r,-54,0,0), (2r,54,0,0), (R,90+72,0,0), (r,180+54,0,0), (2r,-18,0,0), (R,90,0,0), (r,90+72,0,0), (2r,-…