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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 3 |
| 3 | -27 |
| 4 | -189 |
| 5 | -567 |
| 6 | 189 |
| 7 | 11259 |
| 8 | 59859 |
| 9 | 129033 |
| 10 | -395847 |
| 11 | -4730481 |
| 12 | -19580211 |
| 13 | -21264201 |
| 14 | 258785523 |
| 15 | 1917734373 |
| 16 | 6051991059 |
| 17 | -2659507911 |
| 18 | -135544952151 |
| 19 | -738957668337 |
| 20 | -1618780564359 |
| 21 | 5297724346923 |
| 22 | 63513121347063 |
| 23 | 266379249285873 |
| 24 | 286776522444861 |
| 25 | -3683959713627417 |
[1,3,3,-27,-189,-567,189,11259,59859,129033, -395847,-4730481,-19580211,-21264201,258785523, 1917734373,6051991059,-2659507911,-135544952151, -738957668337,-1618780564359,5297724346923, 63513121347063,266379249285873,286776522444861, -3683959713627417] |