n | a(n) |
---|---|
2 | 3 |
3 | 12 |
4 | 42 |
5 | 252 |
6 | 1512 |
7 | 12096 |
8 | 60480 |
9 | 393120 |
10 | 3538080 |
11 | 42456960 |
12 | 396264960 |
13 | 5547709440 |
14 | 66572513280 |
15 | 798870159360 |
16 | 6191243735040 |
17 | 111442387230720 |
18 | 1448751033999360 |
19 | 28975020679987200 |
20 | 405650289519820800 |
[3,12,42,252,1512,12096,60480,393120,3538080, 42456960,396264960,5547709440,66572513280, 798870159360,6191243735040,111442387230720, 1448751033999360,28975020679987200, 405650289519820800] |