The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 90 |
| 4 | -1176 |
| 5 | 185094 |
| 6 | 530772 |
| 7 | 1636156522 |
| 8 | 170829306928 |
| 9 | 60742435952974 |
| 10 | 18173279227072940 |
| 11 | 7353969776707569554 |
| 12 | 3655980234829231451912 |
| 13 | 2065776616635942000462390 |
| 14 | 1427955074795894359873706436 |
| 15 | 1109745897830641117410245879226 |
[1,0,0,90,-1176,185094,530772,1636156522, 170829306928,60742435952974,18173279227072940, 7353969776707569554,3655980234829231451912, 2065776616635942000462390, 1427955074795894359873706436, 1109745897830641117410245879226] |