n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 30 |
3 | 140 |
4 | 560 |
5 | 2016 |
6 | 6720 |
7 | 21120 |
8 | 63360 |
9 | 183040 |
10 | 512512 |
11 | 1397760 |
12 | 3727360 |
13 | 9748480 |
14 | 25067520 |
15 | 63504384 |
16 | 158760960 |
17 | 392232960 |
18 | 958791680 |
19 | 2321285120 |
20 | 5571084288 |
21 | 13264486400 |
22 | 31352422400 |
23 | 73610035200 |
24 | 171756748800 |
[1,5,30,140,560,2016,6720,21120,63360,183040, 512512,1397760,3727360,9748480,25067520,63504384, 158760960,392232960,958791680,2321285120, 5571084288,13264486400,31352422400,73610035200, 171756748800] |