The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -8 |
| 2 | -32 |
| 3 | 1024 |
| 4 | -12800 |
| 5 | 90112 |
| 6 | -131072 |
| 7 | -2097152 |
| 8 | -78774272 |
| 9 | 3080716288 |
| 10 | -49736056832 |
| 11 | 407753457664 |
| 12 | -222801428480 |
| 13 | -19645180411904 |
| 14 | -494299196162048 |
| 15 | 22797274090307584 |
| 16 | -393216908922454016 |
| 17 | 3294704322255781888 |
| 18 | 1334801068806111232 |
| 19 | -228652837223366918144 |
| 20 | -4282607861714030428160 |
| 21 | 222230748909257887842304 |
[1,-8,-32,1024,-12800,90112,-131072,-2097152, -78774272,3080716288,-49736056832,407753457664, -222801428480,-19645180411904,-494299196162048, 22797274090307584,-393216908922454016, 3294704322255781888,1334801068806111232, -228652837223366918144,-4282607861714030428160, 222230748909257887842304] |