方阵A(n,k)开始:
1, 1, 1, 1, 1, 1, 1, 1, 1, ...
0, 1, 1, 1, 1, 1, 1, 1, 1, ...
0, 1, 2, 2, 2, 2, 2, 2, 2, ...
0, 1, 3, 6, 6, 6, 6, 6, 6, ...
0, 1, 5, 12, 24, 24, 24, 24, 24, ...
0, 1, 8, 25, 60, 120, 120, 120, 120, ...
0, 1, 13, 57, 150, 360, 720, 720, 720, ...
0, 1, 21, 124, 399, 1050, 2520, 5040, 5040, ...
0, 1, 34, 268, 1145, 3192, 8400, 20160, 40320, ...