n | a(n) |
---|---|
0 | 3 |
1 | 2 |
2 | 2 |
3 | 3 |
4 | 8 |
5 | 35 |
6 | 204 |
7 | 1421 |
8 | 11360 |
9 | 102231 |
10 | 1022300 |
11 | 11245289 |
12 | 134943456 |
13 | 1754264915 |
14 | 24559708796 |
15 | 368395631925 |
16 | 5894330110784 |
17 | 100203611883311 |
18 | 1803665013899580 |
19 | 34269635264092001 |
20 | 685392705281840000 |
[3,2,2,3,8,35,204,1421,11360,102231,1022300, 11245289,134943456,1754264915,24559708796, 368395631925,5894330110784,100203611883311, 1803665013899580,34269635264092001, 685392705281840000] |