n | a(n) |
---|---|
0 | 0 |
1 | 8 |
2 | 48 |
3 | 280 |
4 | 1632 |
5 | 9512 |
6 | 55440 |
7 | 323128 |
8 | 1883328 |
9 | 10976840 |
10 | 63977712 |
11 | 372889432 |
12 | 2173358880 |
13 | 12667263848 |
14 | 73830224208 |
15 | 430314081400 |
16 | 2508054264192 |
17 | 14618011503752 |
18 | 85200014758320 |
19 | 496582077046168 |
20 | 2894292447518688 |
[0,8,48,280,1632,9512,55440,323128,1883328, 10976840,63977712,372889432,2173358880, 12667263848,73830224208,430314081400, 2508054264192,14618011503752,85200014758320, 496582077046168,2894292447518688] |