方阵A(n,k)开始:
1, 1, 1, 1, 1, 1, 1, 1, ...
0, 1, 1, 1, 1, 1, 1, 1, ...
0, 1, 2, 2, 2, 2, 2, 2, ...
0, 2, 4, 5, 5, 5, 5, 5, ...
0, 5, 16, 19, 20, 20, 20, 20, ...
0, 16, 54, 82, 86, 87, 87, 87, ...
0, 61, 324, 454, 516, 521, 522, 522, ...
0, 272, 1532, 2795, 3135, 3264, 3270, 3271, ...