n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 50 |
3 | 390 |
4 | 3360 |
5 | 31920 |
6 | 332640 |
7 | 3780000 |
8 | 46569600 |
9 | 618710400 |
10 | 8821612800 |
11 | 134399865600 |
12 | 2179457280000 |
13 | 37486665216000 |
14 | 681734237184000 |
15 | 13071512982528000 |
16 | 263564384219136000 |
17 | 5575400435404800000 |
18 | 123469776914964480000 |
19 | 2856835183101419520000 |
[1,7,50,390,3360,31920,332640,3780000,46569600, 618710400,8821612800,134399865600,2179457280000, 37486665216000,681734237184000,13071512982528000, 263564384219136000,5575400435404800000, 123469776914964480000,2856835183101419520000] |