n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 8 |
4 | 64 |
5 | 540 |
6 | 4320 |
7 | 35008 |
8 | 280064 |
9 | 2244152 |
10 | 17955008 |
11 | 143670304 |
12 | 1149362432 |
13 | 9195171392 |
14 | 73561371136 |
15 | 588492929536 |
16 | 4707943678208 |
17 | 37663565234758 |
18 | 301308521878064 |
19 | 2410468302643136 |
20 | 19283746421145088 |
21 | 154269972376667232 |
[1,1,8,64,540,4320,35008,280064,2244152,17955008, 143670304,1149362432,9195171392,73561371136, 588492929536,4707943678208,37663565234758, 301308521878064,2410468302643136, 19283746421145088,154269972376667232] |