n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 6 |
5 | 15 |
6 | 36 |
7 | 91 |
8 | 231 |
9 | 595 |
10 | 1540 |
11 | 4005 |
12 | 10440 |
13 | 27261 |
14 | 71253 |
15 | 186355 |
16 | 487578 |
17 | 1276003 |
18 | 3339820 |
19 | 8742471 |
20 | 22885995 |
21 | 59912931 |
22 | 156848616 |
23 | 410626153 |
24 | 1075018896 |
25 | 2814412825 |
26 | 7368190921 |
27 | 19290113571 |
28 | 50502074766 |
29 | 132215989335 |
30 | 346145696820 |
31 | 906220783315 |
[0,1,1,3,6,15,36,91,231,595,1540,4005,10440,27261, 71253,186355,487578,1276003,3339820,8742471, 22885995,59912931,156848616,410626153,1075018896, 2814412825,7368190921,19290113571,50502074766, 132215989335,346145696820,906220783315] |