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| 例子
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ...
1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, ...
1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, ...
1, 5, 12, 22, 35, 51, 70, 92, 117, 145, 176, ...
1, 6, 15, 28, 45, 66, 91, 120, 153, 190, 231, ...
1, 7, 18, 34, 55, 81, 112, 148, 189, 235, 286, ...
1, 8, 21, 40, 65, 96, 133, 176, 225, 280, 341, ...
1, 9, 24, 46, 75, 111, 154, 204, 261, 325, 396, ...
1, 10, 27, 52, 85, 126, 175, 232, 297, 370, 451, ...
1, 11, 30, 58, 95, 141, 196, 260, 333, 415, 506, ...
1, 12, 33, 64, 105, 156, 217, 288, 369, 460, 561, ...
1, 13, 36, 70, 115, 171, 238, 316, 405, 505, 616, ...
1, 14, 39, 76, 125, 186, 259, 344, 441, 550, 671, ...
k\m 1 2 3 4 5 6 7 8 9 10 11 12 13 14。。。
2: 1
3: 1 2
4: 1 3 3
5: 1 4 6 4
6: 1 5 9 10 5
7: 1 6 12 16 15 6
8: 1 7 15 22 25 21 7
9: 1 8 18 28 35 36 28 8
10: 1 9 21 34 45 51 49 36 9
11: 1 10 24 40 55 66 70 64 45 10
12: 1 11 27 46 65 81 91 92 81 55 11
13: 1 12 30 52 75 96 112 120 117 100 66 12
14: 1 13 33 58 85 111 133 148 153 145 121 78 13
15: 1 14 36 64 95 126 154 176 189 190 176 144 91 14
...
...
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