n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 36 |
4 | 432 |
5 | 6480 |
6 | 116640 |
7 | 2449440 |
8 | 58786560 |
9 | 1587237120 |
10 | 47617113600 |
11 | 1571364748800 |
12 | 56569130956800 |
13 | 2206196107315200 |
14 | 92660236507238400 |
15 | 4169710642825728000 |
16 | 200146110855634944000 |
17 | 10207451653637382144000 |
[0,1,4,36,432,6480,116640,2449440,58786560, 1587237120,47617113600,1571364748800, 56569130956800,2206196107315200,92660236507238400, 4169710642825728000,200146110855634944000, 10207451653637382144000] |