n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 21 |
3 | 165 |
4 | 1365 |
5 | 11628 |
6 | 100947 |
7 | 888030 |
8 | 7888725 |
9 | 70607460 |
10 | 635745396 |
11 | 5752004349 |
12 | 52251400851 |
13 | 476260169700 |
14 | 4353548972850 |
15 | 39895566894540 |
16 | 366395202809685 |
17 | 3371363686069236 |
18 | 31074067324187580 |
19 | 286845713747883300 |
20 | 2651487106659130740 |
21 | 24539426037817994160 |
[1,3,21,165,1365,11628,100947,888030,7888725, 70607460,635745396,5752004349,52251400851, 476260169700,4353548972850,39895566894540, 366395202809685,3371363686069236, 31074067324187580,286845713747883300, 2651487106659130740,24539426037817994160] |