n | a(n) |
---|---|
2 | 5 |
3 | 21 |
4 | 176 |
5 | 680 |
6 | 5808 |
7 | 21840 |
8 | 190976 |
9 | 708480 |
10 | 6310400 |
11 | 23220736 |
12 | 209756160 |
13 | 767676416 |
14 | 7010676736 |
15 | 25558732800 |
16 | 235443322880 |
17 | 855858053120 |
18 | 7939647995904 |
19 | 28796047982592 |
20 | 268690773770240 |
21 | 972740537352192 |
22 | 9120760620646400 |
[5,21,176,680,5808,21840,190976,708480,6310400, 23220736,209756160,767676416,7010676736, 25558732800,235443322880,855858053120, 7939647995904,28796047982592,268690773770240, 972740537352192,9120760620646400] |