n | a(n) |
---|---|
4 | 1 |
5 | 13 |
6 | 37 |
7 | 73 |
8 | 309 |
9 | 2413 |
10 | 28031 |
11 | 212649 |
12 | 2010251 |
13 | 29604759 |
14 | 633868196 |
15 | 15160513746 |
16 | 396011442436 |
17 | 13223926465865 |
18 | 597617100526032 |
[1,13,37,73,309,2413,28031,212649,2010251, 29604759,633868196,15160513746,396011442436, 13223926465865,597617100526032] |