n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 12 |
4 | 80 |
5 | 560 |
6 | 4032 |
7 | 29568 |
8 | 219648 |
9 | 1647360 |
10 | 12446720 |
11 | 94595072 |
12 | 722362368 |
13 | 5538111488 |
14 | 42600857600 |
15 | 328635187200 |
16 | 2541445447680 |
17 | 19696202219520 |
18 | 152935217233920 |
19 | 1189496134041600 |
20 | 9265548833587200 |
21 | 72271280901980160 |
22 | 564404288948797440 |
23 | 4412615349963325440 |
[1,2,12,80,560,4032,29568,219648,1647360,12446720, 94595072,722362368,5538111488,42600857600, 328635187200,2541445447680,19696202219520, 152935217233920,1189496134041600,9265548833587200, 72271280901980160,564404288948797440, 4412615349963325440] |