n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 2 |
3 | 8 |
4 | 60 |
5 | 544 |
6 | 6040 |
7 | 79008 |
8 | 1190672 |
9 | 20314880 |
10 | 387099936 |
11 | 8148296320 |
12 | 187778717632 |
13 | 4702248334848 |
14 | 127140703364480 |
15 | 3691602647581184 |
16 | 114562300528369920 |
17 | 3784124901630435328 |
18 | 132555364873399378432 |
19 | 4908221631901073295360 |
20 | 191549525877429961604096 |
[1,0,2,8,60,544,6040,79008,1190672,20314880, 387099936,8148296320,187778717632,4702248334848, 127140703364480,3691602647581184, 114562300528369920,3784124901630435328, 132555364873399378432,4908221631901073295360, 191549525877429961604096] |