n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 608 |
7 | 3684 |
8 | 26640 |
9 | 192228 |
10 | 1659048 |
11 | 14739946 |
12 | 146975590 |
13 | 1544407392 |
14 | 17545685816 |
15 | 223201723716 |
16 | 2939542170692 |
[1,2,6,24,120,608,3684,26640,192228,1659048, 14739946,146975590,1544407392,17545685816, 223201723716,2939542170692] |