n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 13 |
5 | 34 |
6 | 91 |
7 | 247 |
8 | 680 |
9 | 1893 |
10 | 5319 |
11 | 15056 |
12 | 42867 |
13 | 122605 |
14 | 351898 |
15 | 1012729 |
16 | 2920521 |
17 | 8435362 |
18 | 24392655 |
19 | 70599403 |
20 | 204472264 |
[1,2,5,13,34,91,247,680,1893,5319,15056,42867, 122605,351898,1012729,2920521,8435362,24392655, 70599403,204472264] |