n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 720 |
7 | 15120 |
8 | 191520 |
9 | 1905120 |
10 | 16435440 |
11 | 129230640 |
12 | 953028720 |
13 | 6711344640 |
14 | 45674173440 |
15 | 302899156560 |
16 | 1969146930240 |
17 | 12604139926560 |
18 | 79694818842240 |
19 | 499018753280880 |
20 | 3100376788241040 |
[0,0,0,0,0,720,15120,191520,1905120,16435440, 129230640,953028720,6711344640,45674173440, 302899156560,1969146930240,12604139926560, 79694818842240,499018753280880,3100376788241040] |