三角形T(n,k)开始
1;
1, 1;
1, 0, 1;
1, 3, 0, 1;
1, 0, 0, 0, 1;
1, 10, 15, 0, 0, 1;
1, 0, 0, 0, 0, 0, 1;
1, 35, 0, 105, 0, 0, 0, 1;
1, 0, 280, 0, 0, 0, 0, 0, 1;
1, 126, 0, 0, 945, 0, 0, 0, 0, 1;
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1;
1, 462, 5775, 15400, 0, 10395, 0, 0, 0, 0, 0, 1;
...
T(6,2)=10,因为有10种方法可以将6个人(A、B、C、D、E、F)分为2组,每组3人。赋值为{A,B,C}|{D,E,F},{A,B,D}|{C,E,F},{A,B,E}|{C,D,F},{A,B,F}|{C,D,E},{A,C,D}|{B,E,F},{A,C,F}|{B,D,E},{A,E,F},{B,C,E}|{A,D,F}和{B,C,F}|{A,D,E}。