n | a(n) |
---|---|
3 | 1 |
4 | 1 |
5 | 3 |
6 | 8 |
7 | 26 |
8 | 96 |
9 | 414 |
10 | 2040 |
11 | 11432 |
12 | 72022 |
13 | 503973 |
14 | 3875329 |
15 | 32429747 |
16 | 292872455 |
17 | 2834089224 |
18 | 29209213572 |
19 | 318979706486 |
[1,1,3,8,26,96,414,2040,11432,72022,503973, 3875329,32429747,292872455,2834089224,29209213572, 318979706486] |