n | a(n) |
---|---|
0 | -1 |
1 | 2 |
2 | -24 |
3 | 720 |
4 | -40320 |
5 | 3628800 |
6 | -479001600 |
7 | 87178291200 |
8 | -20922789888000 |
9 | 6402373705728000 |
10 | -2432902008176640000 |
11 | 1124000727777607680000 |
12 | -620448401733239439360000 |
13 | 403291461126605635584000000 |
14 | -304888344611713860501504000000 |
15 | 265252859812191058636308480000000 |
[-1,2,-24,720,-40320,3628800,-479001600, 87178291200,-20922789888000,6402373705728000, -2432902008176640000,1124000727777607680000, -620448401733239439360000, 403291461126605635584000000, -304888344611713860501504000000, 265252859812191058636308480000000] |