n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 8 |
4 | 54 |
5 | 13500 |
6 | 3087000 |
7 | 3652264 |
8 | 1157625 |
9 | 456533 |
10 | 166375 |
11 | 4492125 |
12 | 1728000 |
13 | 394444512000 |
14 | 240827600093696 |
15 | 869479900246125 |
16 | 384557787648000 |
17 | 90468670208000 |
18 | 83064482131968 |
19 | 13819853214706176 |
20 | 45242839158999552000 |
21 | 22447962513858357000 |
[1,1,8,54,13500,3087000,3652264,1157625,456533, 166375,4492125,1728000,394444512000, 240827600093696,869479900246125,384557787648000, 90468670208000,83064482131968,13819853214706176, 45242839158999552000,22447962513858357000] |