n | a(n) |
---|---|
9 | 1 |
10 | 0 |
11 | 55 |
12 | 440 |
13 | 6435 |
14 | 88088 |
15 | 1326325 |
16 | 21209760 |
17 | 360590230 |
18 | 6490575520 |
19 | 123321027258 |
20 | 2466420377200 |
21 | 51794828215130 |
22 | 1139486220235440 |
23 | 26208183066232310 |
24 | 628996393588267936 |
25 | 15724909839708741375 |
[1,0,55,440,6435,88088,1326325,21209760,360590230, 6490575520,123321027258,2466420377200, 51794828215130,1139486220235440,26208183066232310, 628996393588267936,15724909839708741375] |