n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | -2 |
4 | 12 |
5 | -120 |
6 | 1684 |
7 | -31120 |
8 | 730167 |
9 | -21231238 |
10 | 750298888 |
11 | -31687276404 |
12 | 1575667784824 |
13 | -91052587870552 |
14 | 6045175643449008 |
15 | -456560323906523200 |
16 | 38886167319641201692 |
17 | -3706800668529432678016 |
18 | 392824268201002386964776 |
[1,1,-2,12,-120,1684,-31120,730167,-21231238, 750298888,-31687276404,1575667784824, -91052587870552,6045175643449008, -456560323906523200,38886167319641201692, -3706800668529432678016,392824268201002386964776] |