n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 15 |
4 | 99 |
5 | 795 |
6 | 7485 |
7 | 80745 |
8 | 981225 |
9 | 13253625 |
10 | 196834995 |
11 | 3185662095 |
12 | 55770765435 |
13 | 1049572599075 |
14 | 21120725230605 |
15 | 452384160453225 |
16 | 10272547048388625 |
17 | 246434674107647025 |
18 | 6226347228582355875 |
19 | 165224032352989584975 |
20 | 4593512876411509125075 |
[1,1,3,15,99,795,7485,80745,981225,13253625, 196834995,3185662095,55770765435,1049572599075, 21120725230605,452384160453225,10272547048388625, 246434674107647025,6226347228582355875, 165224032352989584975,4593512876411509125075] |