n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | -3 |
4 | 6 |
5 | 30 |
6 | -720 |
7 | 9180 |
8 | -79020 |
9 | -283500 |
10 | 41886720 |
11 | -1580008680 |
12 | 44344341000 |
13 | -851982076440 |
14 | -5914076263200 |
15 | 1972181136416400 |
16 | -153108297672649200 |
17 | 8900721288190544400 |
18 | -403768420629168268800 |
19 | 9341444542413659205600 |
20 | 856476985107522346596000 |
[1,1,-3,6,30,-720,9180,-79020,-283500,41886720, -1580008680,44344341000,-851982076440, -5914076263200,1972181136416400, -153108297672649200,8900721288190544400, -403768420629168268800,9341444542413659205600, 856476985107522346596000] |