n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 84 |
4 | 1008 |
5 | 15840 |
6 | 308880 |
7 | 7207200 |
8 | 196035840 |
9 | 6094932480 |
10 | 213322636800 |
11 | 8303173401600 |
12 | 355850288640000 |
13 | 16653793508352000 |
14 | 845180020548864000 |
15 | 46236318771202560000 |
16 | 2712530701243883520000 |
17 | 169890080762116915200000 |
18 | 11314679378756986552320000 |
[1,2,10,84,1008,15840,308880,7207200,196035840, 6094932480,213322636800,8303173401600, 355850288640000,16653793508352000, 845180020548864000,46236318771202560000, 2712530701243883520000,169890080762116915200000, 11314679378756986552320000] |