n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 8 |
3 | 69 |
4 | 2705 |
5 | 3673410 |
6 | 6746994391242 |
7 | 22760966657776105541085632 |
8 | 259030801598197790167764376907440725907087677647628 |
[0,1,8,69,2705,3673410,6746994391242, 22760966657776105541085632, 25903080159819779016776437690744072590708767764762\ 8] |