n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 5 |
3 | -5 |
4 | 74 |
5 | -154 |
6 | 2484 |
7 | -8028 |
8 | 149904 |
9 | -663696 |
10 | 14257440 |
11 | -80627040 |
12 | 1965444480 |
13 | -13575738240 |
14 | 370643938560 |
15 | -3031488633600 |
16 | 91657072281600 |
17 | -867718162483200 |
18 | 28779361764249600 |
19 | -309920046408806400 |
20 | 11185850044938240000 |
21 | -135153868608460800000 |
[1,0,5,-5,74,-154,2484,-8028,149904,-663696, 14257440,-80627040,1965444480,-13575738240, 370643938560,-3031488633600,91657072281600, -867718162483200,28779361764249600, -309920046408806400,11185850044938240000, -135153868608460800000] |