n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 6 |
6 | 0 |
7 | 3 |
8 | 39 |
9 | 39 |
10 | 105 |
11 | 378 |
12 | 594 |
13 | 1344 |
14 | 4092 |
15 | 9150 |
16 | 22374 |
17 | 60696 |
18 | 150426 |
19 | 377184 |
20 | 985650 |
21 | 2552319 |
22 | 6634257 |
23 | 17457894 |
24 | 46069254 |
25 | 121788231 |
26 | 323097138 |
27 | 860451210 |
28 | 2297043408 |
29 | 6143371473 |
30 | 16474006986 |
[0,0,6,0,3,39,39,105,378,594,1344,4092,9150,22374, 60696,150426,377184,985650,2552319,6634257, 17457894,46069254,121788231,323097138,860451210, 2297043408,6143371473,16474006986] |