n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 12 |
4 | 112 |
5 | 1450 |
6 | 23976 |
7 | 482944 |
8 | 11472896 |
9 | 314061948 |
10 | 9734500000 |
11 | 336998573296 |
12 | 12888244482048 |
13 | 539640296743288 |
14 | 24552709165722752 |
15 | 1206192446775000000 |
16 | 63633506348182798336 |
17 | 3587991568046845781776 |
18 | 215334327830586721473024 |
19 | 13705101790650454900938688 |
[1,2,12,112,1450,23976,482944,11472896,314061948, 9734500000,336998573296,12888244482048, 539640296743288,24552709165722752, 1206192446775000000,63633506348182798336, 3587991568046845781776,215334327830586721473024, 13705101790650454900938688] |