n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 0 |
3 | 1 |
4 | 8 |
5 | 49 |
6 | 280 |
7 | 1649 |
8 | 10800 |
9 | 81505 |
10 | 696400 |
11 | 6472033 |
12 | 63562872 |
13 | 652984977 |
14 | 7026210728 |
15 | 79547049681 |
16 | 949709767904 |
17 | 11936248012993 |
18 | 157219119485216 |
19 | 2159448120457409 |
20 | 30811324011852136 |
21 | 455635009201780977 |
22 | 6975424580445456056 |
23 | 110478282815356437809 |
[0,1,0,1,8,49,280,1649,10800,81505,696400,6472033, 63562872,652984977,7026210728,79547049681, 949709767904,11936248012993,157219119485216, 2159448120457409,30811324011852136, 455635009201780977,6975424580445456056, 110478282815356437809] |