三角形开始:
5,
13, 68,
25, 222, 1110,
41, 555, 3951, 19010,
61, 1171, 11263, 70438, 329126,
85, 2198, 27468, 216618, 1245986, 5693968,
...
这是在主对角线对称的无限方桌的下半部分(T(m,n)=T(n,m))。
对于m=2和n=1,一个3X2矩形中的T(2,1)=13个多项式是五个多项式
.
+---+---+---+ +---+ +---+---+
| | | | | | | | |
+---+---+---+ +---+---+---+ +---+---+---+
| | | | | | | | | | |
+---+---+---+ +---+---+---+ +---+---+
.
+---+ +---+---+
| | | | |
+---+---+---+ +---+---+---+
| | | | | | | |
+---+---+---+ +---+---+---+
.
加上所有不同的水平和垂直反射(1+2+2+4+4=13个多边形)。(结束)