如果(n,k)=(3,2):
| 1 2 3
--+--------
1 | 1, 2, 3
2 | 2, 4, 6
3 | 3, 6, 9
独特的产品是1、2、3、4、6、9。因此,A(3,2)=1+2+3+4+6+9=25。
方形数组开始:
1, 1, 1, 1, 1, 1, ...
3, 7, 15, 31, 63, 127, ...
6, 25, 90, 301, 966, 3025, ...
10, 61, 310, 1441, 6370, 27301, ...
15, 136, 990, 6391, 38325, 218926, ...
21, 244, 2220, 17731, 130851, 916714, ...
28, 440, 5300, 54831, 514668, 4519390, ...
36, 680, 9660, 116991, 1280916, 13092430, ...
45, 1022, 17130, 242091, 3070935, 36184072, ...
55, 1472, 28670, 467391, 6807045, 91765822, ...