n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 20 |
6 | 168 |
7 | 25740 |
8 | 1627920 |
9 | 7600186994400 |
10 | 91351145008363640400 |
11 | 41220780807793167133364240240011200 |
12 | 86885947737342403570395603462501113422055643279216000 |
[1,1,2,3,20,168,25740,1627920,7600186994400, 91351145008363640400, 41220780807793167133364240240011200, 86885947737342403570395603462501113422055643279216\ 000] |