n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 5 |
3 | 50 |
4 | 215 |
5 | 646 |
6 | 8711 |
7 | 25475 |
8 | 105925 |
9 | 3091270 |
10 | 11691247 |
11 | 36809705 |
12 | 445872155 |
13 | 1364113925 |
14 | 5085042010 |
15 | 50975292560 |
16 | 183383680088 |
17 | 588817265695 |
18 | 19512559194875 |
19 | 62369303509475 |
20 | 224877933068647 |
21 | 2214198452392027 |
22 | 7686538660149565 |
23 | 25124342108522750 |
[1,1,5,50,215,646,8711,25475,105925,3091270, 11691247,36809705,445872155,1364113925,5085042010, 50975292560,183383680088,588817265695, 19512559194875,62369303509475,224877933068647, 2214198452392027,7686538660149565, 25124342108522750] |