n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 20 |
4 | 70 |
5 | 252 |
6 | 924 |
7 | 3432 |
8 | 12870 |
9 | 48620 |
10 | 184756 |
11 | 705432 |
12 | 2704156 |
13 | 10400600 |
14 | 40116600 |
15 | 155117520 |
16 | 601080390 |
17 | 2333606220 |
18 | 9075135300 |
19 | 35345263800 |
20 | 137846528820 |
21 | 538257874440 |
22 | 2104098963720 |
23 | 8233430727600 |
24 | 32247603683100 |
25 | 126410606437752 |
26 | 495918532948104 |
27 | 1946939425648112 |
[1,2,6,20,70,252,924,3432,12870,48620,184756, 705432,2704156,10400600,40116600,155117520, 601080390,2333606220,9075135300,35345263800, 137846528820,538257874440,2104098963720, 8233430727600,32247603683100,126410606437752, 495918532948104,1946939425648112] |