n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 18 |
3 | 1200 |
4 | 735000 |
5 | 4667544000 |
6 | 332086420512000 |
7 | 279394363051195392000 |
8 | 2892376010829659126572800000 |
9 | 379850021025259936655866602240000000 |
10 | 648304836222110631242066578424390188032000000 |
[1,2,18,1200,735000,4667544000,332086420512000, 279394363051195392000, 2892376010829659126572800000, 379850021025259936655866602240000000, 648304836222110631242066578424390188032000000] |