n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 12 |
4 | 108 |
5 | 1420 |
6 | 24660 |
7 | 541968 |
8 | 14547792 |
9 | 465228720 |
10 | 17385553440 |
11 | 747776581200 |
12 | 36566808933600 |
13 | 2012537262763872 |
14 | 123612631608883872 |
15 | 8412289268206662720 |
16 | 630378349868153698560 |
17 | 51733701375836221013760 |
[0,1,2,12,108,1420,24660,541968,14547792, 465228720,17385553440,747776581200,36566808933600, 2012537262763872,123612631608883872, 8412289268206662720,630378349868153698560, 51733701375836221013760] |