n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 12 |
3 | 135 |
4 | 1680 |
5 | 23625 |
6 | 374220 |
7 | 6621615 |
8 | 129729600 |
9 | 2791213425 |
10 | 65472907500 |
11 | 1663666579575 |
12 | 45537716624400 |
13 | 1336089255125625 |
14 | 41837777148667500 |
15 | 1392813754566609375 |
16 | 49126088694402720000 |
17 | 1830138702650463830625 |
18 | 71812362934450726087500 |
[0,1,12,135,1680,23625,374220,6621615,129729600, 2791213425,65472907500,1663666579575, 45537716624400,1336089255125625,41837777148667500, 1392813754566609375,49126088694402720000, 1830138702650463830625,71812362934450726087500] |