n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 720 |
7 | 5040 |
8 | 40321 |
9 | 362891 |
10 | 3628916 |
11 | 39918100 |
12 | 479017320 |
13 | 6227225880 |
14 | 87181167360 |
15 | 1307717550721 |
16 | 20923481174427 |
17 | 355699183594175 |
18 | 6402585344613250 |
19 | 121649122026669070 |
20 | 2432982446760607280 |
[0,1,2,6,24,120,720,5040,40321,362891,3628916, 39918100,479017320,6227225880,87181167360, 1307717550721,20923481174427,355699183594175, 6402585344613250,121649122026669070, 2432982446760607280] |