n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 2 |
4 | 2 |
5 | 4 |
6 | 135 |
7 | 2192 |
8 | 18140 |
9 | 96291 |
10 | 401459 |
11 | 1594603 |
12 | 7089502 |
13 | 45031108 |
14 | 518872408 |
15 | 7088206956 |
16 | 81255284697 |
17 | 741934496544 |
[1,1,2,2,4,135,2192,18140,96291,401459,1594603, 7089502,45031108,518872408,7088206956,81255284697, 741934496544] |