n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 54 |
4 | 680 |
5 | 11000 |
6 | 217392 |
7 | 5076400 |
8 | 136761984 |
9 | 4175432064 |
10 | 142469423360 |
11 | 5372711277824 |
12 | 221903307604992 |
13 | 9961821300640768 |
14 | 482982946946734080 |
15 | 25150966159083264000 |
16 | 1400031335107317628928 |
17 | 82960293298087664648192 |
[1,1,6,54,680,11000,217392,5076400,136761984, 4175432064,142469423360,5372711277824, 221903307604992,9961821300640768, 482982946946734080,25150966159083264000, 1400031335107317628928,82960293298087664648192] |