n | a(n) |
---|---|
7 | 1 |
8 | 16 |
9 | 144 |
10 | 960 |
11 | 5280 |
12 | 25344 |
13 | 109824 |
14 | 439296 |
15 | 1647360 |
16 | 5857280 |
17 | 19914752 |
18 | 65175552 |
19 | 206389248 |
20 | 635043840 |
21 | 1905131520 |
22 | 5588385792 |
23 | 16066609152 |
24 | 45364543488 |
25 | 126012620800 |
26 | 344876646400 |
27 | 931166945280 |
28 | 2483111854080 |
[1,16,144,960,5280,25344,109824,439296,1647360, 5857280,19914752,65175552,206389248,635043840, 1905131520,5588385792,16066609152,45364543488, 126012620800,344876646400,931166945280, 2483111854080] |