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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -4 |
| 2 | 36 |
| 3 | -848 |
| 4 | 23824 |
| 5 | -871872 |
| 6 | 44942912 |
| 7 | -2860930816 |
| 8 | 213856723200 |
| 9 | -19099352929280 |
| 10 | 2010469524579328 |
| 11 | -242177953175506944 |
| 12 | 32998102512641970176 |
| 13 | -5069553933584348397568 |
| 14 | 870871673923373487243264 |
| 15 | -165613871131289362192596992 |
| 16 | 34644281516790333651724337152 |
[1,-4,36,-848,23824,-871872,44942912,-2860930816, 213856723200,-19099352929280,2010469524579328, -242177953175506944,32998102512641970176, -5069553933584348397568,870871673923373487243264, -165613871131289362192596992, 34644281516790333651724337152] |