n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 2 |
5 | 6 |
6 | 31 |
7 | 302 |
8 | 11706 |
9 | 3919531 |
10 | 47073195302 |
11 | 185055980038616706 |
12 | 8711901623180875318209094531 |
13 | 1612189902974799120179526719227635256224945302 |
[0,0,1,2,6,31,302,11706,3919531,47073195302, 185055980038616706,8711901623180875318209094531, 1612189902974799120179526719227635256224945302] |