The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | -1 |
| 2 | -1 |
| 3 | 11 |
| 4 | 491 |
| 5 | 11159 |
| 6 | -460681 |
| 7 | -103577629 |
| 8 | -8160790429 |
| 9 | 624333860399 |
| 10 | 386787409545839 |
| 11 | 68810049201689531 |
| 12 | -6999828208693648549 |
| 13 | -9872674440874152431161 |
| 14 | -3255253386897615662908441 |
| 15 | 346248578699462435167833491 |
| 16 | 1072454627614122049417452882131 |
[-1,-1,11,491,11159,-460681,-103577629, -8160790429,624333860399,386787409545839, 68810049201689531,-6999828208693648549, -9872674440874152431161, -3255253386897615662908441, 346248578699462435167833491, 1072454627614122049417452882131] |