n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | -20 |
3 | 512 |
4 | -27680 |
5 | 2565632 |
6 | -363299840 |
7 | 72957489152 |
8 | -19722824192000 |
9 | 6905862783107072 |
10 | -3040352844189532160 |
11 | 1643816046204280635392 |
12 | -1070739118373698870968320 |
13 | 827017799903621162951770112 |
[0,2,-20,512,-27680,2565632,-363299840, 72957489152,-19722824192000,6905862783107072, -3040352844189532160,1643816046204280635392, -1070739118373698870968320, 827017799903621162951770112] |