n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 2 |
6 | 3 |
7 | 4 |
8 | 6 |
9 | 10 |
10 | 16 |
11 | 29 |
12 | 59 |
13 | 140 |
14 | 400 |
15 | 1413 |
16 | 6467 |
17 | 40261 |
18 | 361139 |
19 | 4990906 |
20 | 114916199 |
21 | 4833601540 |
[1,1,1,2,2,3,4,6,10,16,29,59,140,400,1413,6467, 40261,361139,4990906,114916199,4833601540] |