n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 5 |
3 | 0 |
4 | 238 |
5 | 0 |
6 | 51508 |
7 | 0 |
8 | 35028576 |
9 | 0 |
10 | 59053389408 |
11 | 0 |
12 | 209726098354368 |
13 | 0 |
14 | 1397532391623302400 |
15 | 0 |
16 | 16043549794523492290560 |
17 | 0 |
18 | 297285345537576037788672000 |
19 | 0 |
20 | 8447414796960536731803240038400 |
[1,0,5,0,238,0,51508,0,35028576,0,59053389408,0, 209726098354368,0,1397532391623302400,0, 16043549794523492290560,0, 297285345537576037788672000,0, 8447414796960536731803240038400] |