n | a(n) |
---|---|
3 | 1 |
4 | 0 |
5 | 1 |
6 | 0 |
7 | 0 |
8 | 1 |
9 | 2 |
10 | 17 |
11 | 51 |
12 | 175 |
13 | 827 |
14 | 3951 |
15 | 20428 |
16 | 115262 |
17 | 692851 |
18 | 4324011 |
19 | 29446302 |
20 | 211048631 |
21 | 1623253741 |
22 | 13109205113 |
[1,0,1,0,0,1,2,17,51,175,827,3951,20428,115262, 692851,4324011,29446302,211048631,1623253741, 13109205113] |