n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 14 |
4 | 55 |
5 | 252 |
6 | 1319 |
7 | 7737 |
8 | 50040 |
9 | 351636 |
10 | 2659375 |
11 | 21519027 |
12 | 185279186 |
13 | 1688183135 |
14 | 16206401020 |
15 | 163376811610 |
16 | 1724624368377 |
17 | 19011582728772 |
18 | 218312877627483 |
19 | 2605840967052663 |
20 | 32271957793959066 |
21 | 413991491885677105 |
22 | 5492584623675060620 |
[1,1,4,14,55,252,1319,7737,50040,351636,2659375, 21519027,185279186,1688183135,16206401020, 163376811610,1724624368377,19011582728772, 218312877627483,2605840967052663, 32271957793959066,413991491885677105, 5492584623675060620] |