n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 1 |
7 | 3 |
8 | 12 |
9 | 57 |
10 | 348 |
11 | 2460 |
12 | 19806 |
13 | 178950 |
14 | 1794420 |
15 | 19778210 |
16 | 237696420 |
17 | 3093642300 |
18 | 43350548655 |
19 | 650733622665 |
20 | 10417925247240 |
21 | 177191430300339 |
22 | 3190747212651432 |
23 | 60645032890871688 |
24 | 1213255040678034508 |
25 | 25484737348664027532 |
26 | 560785511736390349080 |
[0,0,0,0,0,0,1,3,12,57,348,2460,19806,178950, 1794420,19778210,237696420,3093642300,43350548655, 650733622665,10417925247240,177191430300339, 3190747212651432,60645032890871688, 1213255040678034508,25484737348664027532, 560785511736390349080] |