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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -6 |
| 2 | 55 |
| 3 | -736 |
| 4 | 13573 |
| 5 | -330058 |
| 6 | 10233219 |
| 7 | -393999940 |
| 8 | 18443289777 |
| 9 | -1031520165710 |
| 10 | 67934648699151 |
| 11 | -5203713576558056 |
| 12 | 458704384454574365 |
| 13 | -46104659405475675026 |
| 14 | 5241286859201262537563 |
| 15 | -669127269362962909934028 |
| 16 | 95322254316544433430632009 |
[1,-6,55,-736,13573,-330058,10233219,-393999940, 18443289777,-1031520165710,67934648699151, -5203713576558056,458704384454574365, -46104659405475675026,5241286859201262537563, -669127269362962909934028, 95322254316544433430632009] |