n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 2 |
6 | 10 |
7 | 32 |
8 | 129 |
9 | 468 |
10 | 1806 |
11 | 6780 |
12 | 25917 |
13 | 98056 |
14 | 372919 |
15 | 1414548 |
16 | 5375974 |
17 | 20432480 |
18 | 77773845 |
19 | 296350460 |
20 | 1130919576 |
21 | 4321818986 |
22 | 16540888897 |
23 | 63399449652 |
24 | 243357204415 |
25 | 935428588930 |
26 | 3600514267686 |
27 | 13876474860110 |
28 | 53546226302319 |
29 | 206864885150216 |
[0,0,0,1,2,10,32,129,468,1806,6780,25917,98056, 372919,1414548,5375974,20432480,77773845, 296350460,1130919576,4321818986,16540888897, 63399449652,243357204415,935428588930, 3600514267686,13876474860110,53546226302319, 206864885150216] |