三角形开头为:
1;
3, 1;
10, 3, 2;
35, 10, 6, 5;
126, 35, 20, 15, 14;
462, 126, 70, 50, 42, 42;
1716, 462, 252, 175, 140, 126, 132;
6435, 1716, 924, 630, 490, 420, 396, 429;
24310, 6435, 3432, 2310, 1764, 1470, 1320, 1287, 1430;
92378, 24310, 12870, 8580, 6468, 5292, 4620, 4290, 4290, 4862;
...
C(0)=1
R(1,0)=C(0)*V(1)=1
C(1)=(2!)/(1!*1!)-R(1,0)=2-1=1
R(2,0)=C(0)*V(2)=3
R(2,1)=C(1)*V(1)=1
C(2)=(4!)/(2!*2!)-[R(2,0)+R(2,1)]=6-[4]=2
R(3,0)=C(0)*V(3)=10
R(3,1)=C(1)*V(2)=3
R(3,2)=C(2)*V(1)=2
C(3)=(6!)/(3!*3!)-[R(3,0)+R(3,1)+R