n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 6 |
4 | 66 |
5 | 772 |
6 | 6760 |
7 | 60122 |
8 | 552930 |
9 | 4887052 |
10 | 42365416 |
11 | 361418592 |
12 | 3063883318 |
13 | 25819450218 |
14 | 215875963118 |
15 | 1793852851690 |
16 | 14833014554258 |
17 | 122147248758898 |
18 | 1002084660185318 |
19 | 8192705916505028 |
20 | 66777880125812344 |
21 | 542833111487459532 |
22 | 4401913323626254612 |
23 | 35616479684643020150 |
[0,0,0,6,66,772,6760,60122,552930,4887052, 42365416,361418592,3063883318,25819450218, 215875963118,1793852851690,14833014554258, 122147248758898,1002084660185318,8192705916505028, 66777880125812344,542833111487459532, 4401913323626254612,35616479684643020150] |