n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 4 |
7 | 13 |
8 | 121 |
9 | 8401 |
10 | 17724001 |
11 | 19980403610080 |
12 | 3017939125082738100693961 |
13 | 1069257489122187637992525695378883464262898201 |
[0,1,1,1,1,4,13,121,8401,17724001,19980403610080, 3017939125082738100693961, 1069257489122187637992525695378883464262898201] |