n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 12 |
4 | 72 |
5 | 240 |
6 | 2400 |
7 | 907200 |
8 | 4233600 |
9 | 25401600 |
10 | 1371686400 |
11 | 251475840000 |
12 | 5532468480000 |
13 | 554827553280000 |
14 | 33659538232320000 |
15 | 73302994372608000 |
16 | 4453156908135936000000 |
17 | 50469111625540608000000 |
18 | 63553696121051136000000 |
[1,2,12,72,240,2400,907200,4233600,25401600, 1371686400,251475840000,5532468480000, 554827553280000,33659538232320000, 73302994372608000,4453156908135936000000, 50469111625540608000000,63553696121051136000000] |