n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 36 |
3 | 540 |
4 | 6480 |
5 | 136080 |
6 | 8164800 |
7 | 24494400 |
8 | 293932800 |
9 | 48498912000 |
10 | 4073908608000 |
11 | 158882435712000 |
12 | 9532946142720000 |
13 | 28598838428160000 |
14 | 343186061137920000 |
15 | 612587119131187200000 |
16 | 7351045429574246400000 |
17 | 419009589485732044800000 |
18 | 276546329060583149568000000 |
[1,3,36,540,6480,136080,8164800,24494400, 293932800,48498912000,4073908608000, 158882435712000,9532946142720000, 28598838428160000,343186061137920000, 612587119131187200000,7351045429574246400000, 419009589485732044800000, 276546329060583149568000000] |