n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 1 |
7 | 4 |
8 | 12 |
9 | 31 |
10 | 79 |
11 | 192 |
12 | 459 |
13 | 1082 |
14 | 2537 |
15 | 5922 |
16 | 13816 |
17 | 32222 |
18 | 75254 |
19 | 176034 |
20 | 412667 |
21 | 969531 |
22 | 2283278 |
[0,0,0,0,0,1,4,12,31,79,192,459,1082,2537,5922, 13816,32222,75254,176034,412667,969531,2283278] |