n | a(n) |
---|---|
6 | 1 |
7 | 0 |
8 | 2 |
9 | 1 |
10 | 6 |
11 | 6 |
12 | 28 |
13 | 53 |
14 | 229 |
15 | 712 |
16 | 3336 |
17 | 15099 |
18 | 82419 |
19 | 477584 |
20 | 3086563 |
21 | 21566457 |
22 | 164113460 |
23 | 1350167015 |
24 | 12007072739 |
25 | 115165535180 |
[1,0,2,1,6,6,28,53,229,712,3336,15099,82419, 477584,3086563,21566457,164113460,1350167015, 12007072739,115165535180] |