n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 12 |
3 | 104 |
4 | 1200 |
5 | 17312 |
6 | 299712 |
7 | 6053504 |
8 | 139733760 |
9 | 3628677632 |
10 | 104701504512 |
11 | 3323151509504 |
12 | 115063060869120 |
13 | 4316023589937152 |
14 | 174347763227738112 |
15 | 7545919601962287104 |
16 | 348366745238330081280 |
17 | 17087957176042900815872 |
18 | 887497598764802460352512 |
[1,2,12,104,1200,17312,299712,6053504,139733760, 3628677632,104701504512,3323151509504, 115063060869120,4316023589937152, 174347763227738112,7545919601962287104, 348366745238330081280,17087957176042900815872, 887497598764802460352512] |