n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 6 |
4 | 30 |
5 | 70 |
6 | 420 |
7 | 1050 |
8 | 6930 |
9 | 18018 |
10 | 126126 |
11 | 336336 |
12 | 2450448 |
13 | 6651216 |
14 | 49884120 |
15 | 137181330 |
16 | 1051723530 |
17 | 2921454250 |
18 | 22787343150 |
19 | 63804560820 |
20 | 504636071940 |
21 | 1422156202740 |
22 | 11377249621920 |
23 | 32235540595440 |
24 | 260363981732400 |
[1,3,6,30,70,420,1050,6930,18018,126126,336336, 2450448,6651216,49884120,137181330,1051723530, 2921454250,22787343150,63804560820,504636071940, 1422156202740,11377249621920,32235540595440, 260363981732400] |