n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 21 |
4 | 105 |
5 | 580 |
6 | 4332 |
7 | 33173 |
8 | 333057 |
9 | 3249334 |
10 | 41175698 |
11 | 485901669 |
12 | 7470988137 |
13 | 102962077608 |
14 | 1870375878472 |
15 | 29342124588357 |
16 | 617978798588225 |
17 | 10818920340476010 |
18 | 260570216908845406 |
19 | 5009431835664474101 |
20 | 136578252867673635369 |
21 | 2844357524328057280332 |
22 | 87134882338620095240484 |
[1,2,6,21,105,580,4332,33173,333057,3249334, 41175698,485901669,7470988137,102962077608, 1870375878472,29342124588357,617978798588225, 10818920340476010,260570216908845406, 5009431835664474101,136578252867673635369, 2844357524328057280332,87134882338620095240484] |