n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 20 |
4 | 70 |
5 | 252 |
6 | 924 |
7 | 1144 |
8 | 12870 |
9 | 48620 |
10 | 184756 |
11 | 705432 |
12 | 2704156 |
13 | 10400600 |
14 | 40116600 |
15 | 155117520 |
16 | 200360130 |
17 | 466721244 |
18 | 9075135300 |
19 | 11781754600 |
20 | 137846528820 |
21 | 538257874440 |
22 | 140273264248 |
23 | 8233430727600 |
24 | 32247603683100 |
[1,2,6,20,70,252,924,1144,12870,48620,184756, 705432,2704156,10400600,40116600,155117520, 200360130,466721244,9075135300,11781754600, 137846528820,538257874440,140273264248, 8233430727600,32247603683100] |