n | a(n) |
---|---|
4 | 1 |
5 | 13 |
6 | 37 |
7 | 73 |
8 | 258 |
9 | 1871 |
10 | 22758 |
11 | 161452 |
12 | 1241904 |
13 | 16300245 |
14 | 324762872 |
15 | 7210518148 |
16 | 157052254320 |
17 | 4356147792581 |
[1,13,37,73,258,1871,22758,161452,1241904, 16300245,324762872,7210518148,157052254320, 4356147792581] |