n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | 1 |
3 | 15 |
4 | 113 |
5 | 783 |
6 | 5361 |
7 | 36879 |
8 | 255985 |
9 | 1794063 |
10 | 12689393 |
11 | 90505231 |
12 | 650379249 |
13 | 4705157135 |
14 | 34244198385 |
15 | 250572963855 |
16 | 1842382110705 |
17 | 13605619630095 |
18 | 100872203796465 |
19 | 750556607938575 |
20 | 5602962592235505 |
21 | 41952165966643215 |
22 | 314983352736153585 |
[1,-1,1,15,113,783,5361,36879,255985,1794063, 12689393,90505231,650379249,4705157135, 34244198385,250572963855,1842382110705, 13605619630095,100872203796465,750556607938575, 5602962592235505,41952165966643215, 314983352736153585] |