n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 1 |
6 | 1 |
7 | 2 |
8 | 4 |
9 | 6 |
10 | 12 |
11 | 20 |
12 | 35 |
13 | 63 |
14 | 108 |
15 | 192 |
16 | 336 |
17 | 588 |
18 | 1036 |
19 | 1813 |
20 | 3185 |
21 | 5590 |
22 | 9804 |
23 | 17214 |
24 | 30200 |
25 | 53000 |
26 | 93015 |
27 | 163215 |
28 | 286440 |
29 | 502656 |
30 | 882096 |
31 | 1547992 |
32 | 2716504 |
33 | 4767161 |
34 | 8365777 |
35 | 14680890 |
36 | 25763220 |
37 | 45211238 |
38 | 79340228 |
39 | 139232412 |
40 | 244335771 |
[0,0,0,0,0,1,1,2,4,6,12,20,35,63,108,192,336,588, 1036,1813,3185,5590,9804,17214,30200,53000,93015, 163215,286440,502656,882096,1547992,2716504, 4767161,8365777,14680890,25763220,45211238, 79340228,139232412,244335771] |