n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 3 |
4 | 12 |
5 | 69 |
6 | 278 |
7 | 2524 |
8 | 27024 |
9 | 250688 |
10 | 3721984 |
11 | 56111104 |
12 | 835883008 |
13 | 17920733184 |
14 | 437473529856 |
15 | 9120031211520 |
16 | 270263516958720 |
[1,2,3,12,69,278,2524,27024,250688,3721984, 56111104,835883008,17920733184,437473529856, 9120031211520,270263516958720] |