n | a(n) |
---|---|
1 | 0 |
2 | 7 |
3 | 52 |
4 | 378 |
5 | 2832 |
6 | 21785 |
7 | 171036 |
8 | 1364391 |
9 | 11023264 |
10 | 89985681 |
11 | 740894700 |
12 | 6144227430 |
13 | 51267563280 |
14 | 430045297695 |
15 | 3623966778180 |
16 | 30662599042530 |
17 | 260367332354496 |
18 | 2217928838577641 |
19 | 18947382204700044 |
20 | 162281586037920126 |
[0,7,52,378,2832,21785,171036,1364391,11023264, 89985681,740894700,6144227430,51267563280, 430045297695,3623966778180,30662599042530, 260367332354496,2217928838577641, 18947382204700044,162281586037920126] |