n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | -3 |
4 | 11 |
5 | -50 |
6 | 214 |
7 | -504 |
8 | -6252 |
9 | 162576 |
10 | -2754684 |
11 | 42663060 |
12 | -650722260 |
13 | 10034523720 |
14 | -158078985000 |
15 | 2553082867440 |
16 | -42265263885600 |
17 | 715134876153600 |
18 | -12299306666944560 |
19 | 213041497002431760 |
20 | -3658374963886842000 |
21 | 60422495064228108000 |
[0,0,1,-3,11,-50,214,-504,-6252,162576,-2754684, 42663060,-650722260,10034523720,-158078985000, 2553082867440,-42265263885600,715134876153600, -12299306666944560,213041497002431760, -3658374963886842000,60422495064228108000] |