n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 20 |
4 | 70 |
5 | 245 |
6 | 860 |
7 | 3015 |
8 | 10570 |
9 | 37060 |
10 | 129935 |
11 | 455560 |
12 | 1597225 |
13 | 5599980 |
14 | 19633910 |
15 | 68837825 |
16 | 241350100 |
17 | 846189875 |
18 | 2966799290 |
19 | 10401800220 |
20 | 36469419475 |
21 | 127864266640 |
22 | 448300820765 |
23 | 1571773187140 |
24 | 5510743762630 |
[1,5,20,70,245,860,3015,10570,37060,129935,455560, 1597225,5599980,19633910,68837825,241350100, 846189875,2966799290,10401800220,36469419475, 127864266640,448300820765,1571773187140, 5510743762630] |