n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | -2 |
4 | -11 |
5 | 24 |
6 | 349 |
7 | -720 |
8 | -22455 |
9 | 40320 |
10 | 2465241 |
11 | -3628800 |
12 | -416217603 |
13 | 479001600 |
14 | 100729124469 |
15 | -87178291200 |
16 | -33198564667887 |
17 | 20922789888000 |
18 | 14328891118054449 |
19 | -6402373705728000 |
20 | -7852649782447649403 |
[1,1,1,-2,-11,24,349,-720,-22455,40320,2465241, -3628800,-416217603,479001600,100729124469, -87178291200,-33198564667887,20922789888000, 14328891118054449,-6402373705728000, -7852649782447649403] |