n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | -4 |
3 | -40 |
4 | 2704 |
5 | -135392 |
6 | 6955456 |
7 | -305645184 |
8 | -7730286336 |
9 | 7469091807744 |
10 | -2423718751585280 |
11 | 765682386623223808 |
12 | -278356000956737810432 |
13 | 126892576689335471251456 |
[1,2,-4,-40,2704,-135392,6955456,-305645184, -7730286336,7469091807744,-2423718751585280, 765682386623223808,-278356000956737810432, 126892576689335471251456] |