n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 0 |
9 | 1 |
10 | 1 |
11 | 1 |
12 | 1 |
13 | 4 |
14 | 4 |
15 | 10 |
16 | 10 |
17 | 20 |
18 | 10 |
19 | 20 |
20 | 35 |
21 | 20 |
22 | 35 |
23 | 56 |
24 | 56 |
25 | 56 |
26 | 84 |
27 | 84 |
28 | 120 |
29 | 84 |
30 | 120 |
31 | 165 |
32 | 220 |
33 | 220 |
34 | 220 |
35 | 286 |
36 | 286 |
37 | 286 |
38 | 364 |
39 | 455 |
40 | 455 |
41 | 560 |
42 | 455 |
43 | 680 |
44 | 560 |
45 | 680 |
46 | 680 |
47 | 816 |
48 | 969 |
49 | 1140 |
50 | 969 |
[0,0,0,0,0,0,0,0,1,1,1,1,4,4,10,10,20,10,20,35,20, 35,56,56,56,84,84,120,84,120,165,220,220,220,286, 286,286,364,455,455,560,455,680,560,680,680,816, 969,1140,969] |