n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 34 |
5 | 280 |
6 | 3010 |
7 | 39984 |
8 | 634040 |
9 | 11704548 |
10 | 246799212 |
11 | 5856139256 |
12 | 154509170816 |
13 | 4488522398568 |
14 | 142395677932872 |
15 | 4899139202191216 |
16 | 181714457372434436 |
17 | 7228856213182113768 |
18 | 307047663830976178304 |
[1,2,6,34,280,3010,39984,634040,11704548, 246799212,5856139256,154509170816,4488522398568, 142395677932872,4899139202191216, 181714457372434436,7228856213182113768, 307047663830976178304] |