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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | -4 |
| 3 | -104 |
| 4 | 6656 |
| 5 | -40064 |
| 6 | -42409984 |
| 7 | 4996996096 |
| 8 | 379877605376 |
| 9 | -280033142964224 |
| 10 | 36077603872833536 |
| 11 | 18835361007974219776 |
| 12 | -11364456303888437346304 |
| 13 | 367251340814801013047296 |
| 14 | 3076185618615703435483283456 |
| 15 | -1692496413849432696569477464064 |
[0,1,-4,-104,6656,-40064,-42409984,4996996096, 379877605376,-280033142964224,36077603872833536, 18835361007974219776,-11364456303888437346304, 367251340814801013047296, 3076185618615703435483283456, -1692496413849432696569477464064] |