| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -23 |
| 3 | -947 |
| 4 | -1733 |
| 5 | -21781 |
| 6 | -43311113 |
| 7 | -2723179 |
| 8 | -6414155401 |
| 9 | -785453333257 |
| 10 | -7699945982293 |
| 11 | -66166822052531 |
| 12 | -239092621861482143 |
| 13 | -271166505959717 |
| 14 | -74473963890443961601 |
| 15 | -163219188105035970948619 |
| 16 | -153312677184465775645847 |
| 17 | -625566886054776334597601 |
[1,-1,-23,-947,-1733,-21781,-43311113,-2723179, -6414155401,-785453333257,-7699945982293, -66166822052531,-239092621861482143, -271166505959717,-74473963890443961601, -163219188105035970948619, -153312677184465775645847, -625566886054776334597601] |