n | a(n) |
---|---|
0 | 2 |
1 | 4 |
2 | 12 |
3 | 64 |
4 | 700 |
5 | 17424 |
6 | 1053696 |
7 | 160579584 |
8 | 62856336636 |
9 | 63812936890000 |
10 | 168895157342195152 |
11 | 1169048914836855865344 |
12 | 21209591746609937928524800 |
13 | 1010490883477487017627972550656 |
14 | 126641164340871500483202065902080000 |
[2,4,12,64,700,17424,1053696,160579584, 62856336636,63812936890000,168895157342195152, 1169048914836855865344,21209591746609937928524800, 1010490883477487017627972550656, 126641164340871500483202065902080000] |