n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 4 |
6 | 12 |
7 | 26 |
8 | 77 |
9 | 204 |
10 | 624 |
11 | 1817 |
12 | 5585 |
13 | 17007 |
14 | 52803 |
15 | 164001 |
16 | 514009 |
17 | 1615044 |
18 | 5100324 |
19 | 16152134 |
20 | 51324864 |
[1,1,1,3,4,12,26,77,204,624,1817,5585,17007,52803, 164001,514009,1615044,5100324,16152134,51324864] |