n | a(n) |
---|---|
3 | 1 |
4 | 10 |
5 | 111 |
6 | 1468 |
7 | 22940 |
8 | 416250 |
9 | 8626660 |
10 | 201349672 |
11 | 5230931454 |
12 | 149783426470 |
13 | 4688281021490 |
14 | 159284662406460 |
15 | 5838769123729984 |
16 | 229711022253150382 |
17 | 9655348958575618320 |
18 | 431845990498159342000 |
19 | 20479127764425617465660 |
20 | 1026429489947790074019978 |
[1,10,111,1468,22940,416250,8626660,201349672, 5230931454,149783426470,4688281021490, 159284662406460,5838769123729984, 229711022253150382,9655348958575618320, 431845990498159342000,20479127764425617465660, 1026429489947790074019978] |