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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 56 |
| 2 | 1214 |
| 3 | -147280 |
| 4 | -15247604 |
| 5 | 278422816 |
| 6 | 162121152136 |
| 7 | 5868012605504 |
| 8 | -1852569274929520 |
| 9 | -193970441218282624 |
| 10 | 21183398609507010016 |
| 11 | 4914382202347784594176 |
| 12 | -172654010070721268484416 |
| 13 | -123013935678909694915202560 |
| 14 | -2574847302391901300899725184 |
[1,56,1214,-147280,-15247604,278422816, 162121152136,5868012605504,-1852569274929520, -193970441218282624,21183398609507010016, 4914382202347784594176,-172654010070721268484416, -123013935678909694915202560, -2574847302391901300899725184] |