n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 21 |
4 | 330 |
5 | 14610 |
6 | 1820715 |
7 | 653629616 |
8 | 696496706166 |
9 | 2267861968974085 |
10 | 23151301116946350437 |
11 | 757490164568070202377310 |
12 | 80950840941871760357231324684 |
[2,4,21,330,14610,1820715,653629616,696496706166, 2267861968974085,23151301116946350437, 757490164568070202377310, 80950840941871760357231324684] |