n | a(n) |
---|---|
2 | 0 |
3 | 0 |
4 | 4 |
5 | 33 |
6 | 236 |
7 | 1795 |
8 | 15114 |
9 | 141113 |
10 | 1451512 |
11 | 16329591 |
12 | 199583990 |
13 | 2634508789 |
14 | 37362124788 |
15 | 566658892787 |
16 | 9153720575986 |
17 | 156920924159985 |
18 | 2845499424767984 |
19 | 54420176498687983 |
20 | 1094805903679487982 |
21 | 23112569077678079981 |
22 | 510909421717094399980 |
[0,0,4,33,236,1795,15114,141113,1451512,16329591, 199583990,2634508789,37362124788,566658892787, 9153720575986,156920924159985,2845499424767984, 54420176498687983,1094805903679487982, 23112569077678079981,510909421717094399980] |