n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 51 |
4 | 226 |
5 | 1026 |
6 | 4733 |
7 | 22083 |
8 | 103914 |
9 | 492228 |
10 | 2344035 |
11 | 11211210 |
12 | 53817063 |
13 | 259135299 |
14 | 1251074772 |
15 | 6053946531 |
16 | 29354128498 |
17 | 142584834924 |
18 | 693691007267 |
19 | 3379680991356 |
20 | 16486985580693 |
21 | 80521218046569 |
22 | 393674826425462 |
[1,3,12,51,226,1026,4733,22083,103914,492228, 2344035,11211210,53817063,259135299,1251074772, 6053946531,29354128498,142584834924,693691007267, 3379680991356,16486985580693,80521218046569, 393674826425462] |