n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 12 |
4 | 96 |
5 | 900 |
6 | 10800 |
7 | 157080 |
8 | 2634240 |
9 | 50455440 |
10 | 1089849600 |
11 | 26157479040 |
12 | 690848040960 |
13 | 19924295751360 |
14 | 623024501299200 |
15 | 20996216063222400 |
16 | 758724126031872000 |
17 | 29267547577396128000 |
18 | 1200407895406514995200 |
[1,1,2,12,96,900,10800,157080,2634240,50455440, 1089849600,26157479040,690848040960, 19924295751360,623024501299200,20996216063222400, 758724126031872000,29267547577396128000, 1200407895406514995200] |