n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 16 |
5 | 54 |
6 | 232 |
7 | 936 |
8 | 3880 |
9 | 17302 |
10 | 81584 |
11 | 425550 |
12 | 2332858 |
13 | 13639774 |
14 | 84416970 |
15 | 555549406 |
16 | 3834425860 |
17 | 27937916790 |
[1,2,6,16,54,232,936,3880,17302,81584,425550, 2332858,13639774,84416970,555549406,3834425860, 27937916790] |