n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 20 |
5 | 230 |
6 | 26795 |
7 | 359026205 |
8 | 64449908476890320 |
9 | 2076895351339769460477611370186680 |
10 | 2156747150208372213435450937462082366919951682912789656986079991220 |
[1,2,5,20,230,26795,359026205,64449908476890320, 2076895351339769460477611370186680, 21567471502083722134354509374620823669199516829127\ 89656986079991220] |