n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 7 |
4 | 24 |
5 | 116 |
6 | 720 |
7 | 5160 |
8 | 40320 |
9 | 350784 |
10 | 3628800 |
11 | 42940800 |
12 | 479001600 |
13 | 4650877440 |
14 | 87178291200 |
15 | 2833294464000 |
16 | 20922789888000 |
17 | -2166903606067200 |
18 | 6402373705728000 |
19 | 6808619561103360000 |
20 | 2432902008176640000 |
21 | -26982365129174827008000 |
22 | 1124000727777607680000 |
[1,2,3,7,24,116,720,5160,40320,350784,3628800, 42940800,479001600,4650877440,87178291200, 2833294464000,20922789888000,-2166903606067200, 6402373705728000,6808619561103360000, 2432902008176640000,-26982365129174827008000, 1124000727777607680000] |