n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 0 |
9 | 362880 |
10 | 3265920 |
11 | 33022080 |
12 | 369774720 |
13 | 4536362880 |
14 | 60451816320 |
15 | 869007242880 |
16 | 13397819541120 |
17 | 220448163358080 |
18 | 3854801333416320 |
19 | 71370457471716480 |
20 | 1394586705296776320 |
21 | 28676809138124407680 |
22 | 618948032364173877120 |
[0,0,0,0,0,0,0,0,362880,3265920,33022080, 369774720,4536362880,60451816320,869007242880, 13397819541120,220448163358080,3854801333416320, 71370457471716480,1394586705296776320, 28676809138124407680,618948032364173877120] |