n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 14 |
4 | 45 |
5 | 186 |
6 | 945 |
7 | 5778 |
8 | 44037 |
9 | 403470 |
10 | 4344877 |
11 | 56072378 |
12 | 793804721 |
13 | 12734185106 |
14 | 229632768005 |
15 | 4628786367502 |
16 | 105803768420397 |
17 | 2626282179198138 |
18 | 71539181027191729 |
19 | 2076395667668755090 |
20 | 65704452165048754181 |
[1,2,5,14,45,186,945,5778,44037,403470,4344877, 56072378,793804721,12734185106,229632768005, 4628786367502,105803768420397,2626282179198138, 71539181027191729,2076395667668755090, 65704452165048754181] |