n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 15 |
5 | 75 |
6 | 495 |
7 | 3465 |
8 | 29295 |
9 | 263655 |
10 | 2735775 |
11 | 30093525 |
12 | 370945575 |
13 | 4822292475 |
14 | 68916822975 |
15 | 1033752344625 |
16 | 16813959537375 |
17 | 285837312135375 |
18 | 5214921734397375 |
19 | 99083512953550125 |
20 | 2004231846526284375 |
21 | 42088868777051971875 |
22 | 934957186489800849375 |
[0,0,1,3,15,75,495,3465,29295,263655,2735775, 30093525,370945575,4822292475,68916822975, 1033752344625,16813959537375,285837312135375, 5214921734397375,99083512953550125, 2004231846526284375,42088868777051971875, 934957186489800849375] |