n | a(n) |
---|---|
2 | 2 |
3 | 4 |
4 | 10 |
5 | 12 |
6 | 84 |
7 | 264 |
8 | 990 |
9 | 2860 |
10 | 9724 |
11 | 18564 |
12 | 117572 |
13 | 45220 |
14 | 19380 |
15 | 1782960 |
16 | 6463230 |
17 | 25092540 |
18 | 58549260 |
19 | 95527740 |
[2,4,10,12,84,264,990,2860,9724,18564,117572, 45220,19380,1782960,6463230,25092540,58549260, 95527740] |