n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 15 |
4 | 35 |
5 | 315 |
6 | 13860 |
7 | 3003 |
8 | 9009 |
9 | 765765 |
10 | 1385670 |
11 | 14549535 |
12 | 66927861 |
13 | 371821450 |
14 | 40156716600 |
15 | 145568097675 |
16 | 136745788725 |
17 | 128931743655 |
18 | 9025222055850 |
19 | 4281195077775 |
20 | 166966608033225 |
21 | 6845630929362225 |
22 | 26165522663340060 |
23 | 294362129962575675 |
[1,1,6,15,35,315,13860,3003,9009,765765,1385670, 14549535,66927861,371821450,40156716600, 145568097675,136745788725,128931743655, 9025222055850,4281195077775,166966608033225, 6845630929362225,26165522663340060, 294362129962575675] |