n | a(n) |
---|---|
3 | 0 |
4 | 4 |
5 | 25 |
6 | 156 |
7 | 1099 |
8 | 8800 |
9 | 79209 |
10 | 792100 |
11 | 8713111 |
12 | 104557344 |
13 | 1359245485 |
14 | 19029436804 |
15 | 285441552075 |
16 | 4567064833216 |
17 | 77640102164689 |
18 | 1397521838964420 |
19 | 26552914940323999 |
20 | 531058298806480000 |
21 | 11152224274936080021 |
[0,4,25,156,1099,8800,79209,792100,8713111, 104557344,1359245485,19029436804,285441552075, 4567064833216,77640102164689,1397521838964420, 26552914940323999,531058298806480000, 11152224274936080021] |