n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 15 |
6 | 3525 |
7 | 98473 |
8 | 1237434 |
9 | 9821400 |
10 | 57367112 |
11 | 268378248 |
12 | 1059987987 |
13 | 3661533037 |
14 | 11341971885 |
15 | 32090198922 |
16 | 84099053568 |
17 | 206386405560 |
18 | 478423135296 |
19 | 1054963957500 |
20 | 2225704950054 |
21 | 4514320792971 |
22 | 8838377453829 |
[0,0,0,0,15,3525,98473,1237434,9821400,57367112, 268378248,1059987987,3661533037,11341971885, 32090198922,84099053568,206386405560,478423135296, 1054963957500,2225704950054,4514320792971, 8838377453829] |