n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 5 |
5 | 15 |
6 | 56 |
7 | 250 |
8 | 1328 |
9 | 8069 |
10 | 54962 |
11 | 410330 |
12 | 3317302 |
13 | 28774874 |
14 | 266242936 |
15 | 2616100423 |
16 | 27205605275 |
17 | 298569256590 |
18 | 3449309394415 |
19 | 41854968275924 |
20 | 532353636671777 |
21 | 7083840662453415 |
22 | 98443312509634266 |
23 | 1426382369328881332 |
[1,1,2,5,15,56,250,1328,8069,54962,410330,3317302, 28774874,266242936,2616100423,27205605275, 298569256590,3449309394415,41854968275924, 532353636671777,7083840662453415, 98443312509634266,1426382369328881332] |