n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 2 |
4 | 8 |
5 | 24 |
6 | 144 |
7 | 720 |
8 | 5760 |
9 | 40320 |
10 | 403200 |
11 | 3628800 |
12 | 43545600 |
13 | 479001600 |
14 | 6706022400 |
15 | 87178291200 |
16 | 1394852659200 |
17 | 20922789888000 |
18 | 376610217984000 |
19 | 6402373705728000 |
20 | 128047474114560000 |
21 | 2432902008176640000 |
22 | 53523844179886080000 |
23 | 1124000727777607680000 |
[0,1,2,2,8,24,144,720,5760,40320,403200,3628800, 43545600,479001600,6706022400,87178291200, 1394852659200,20922789888000,376610217984000, 6402373705728000,128047474114560000, 2432902008176640000,53523844179886080000, 1124000727777607680000] |