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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -5 |
| 2 | -6 |
| 3 | 305 |
| 4 | 330 |
| 5 | -15125 |
| 6 | -48726 |
| 7 | 12612265 |
| 8 | 13534410 |
| 9 | -1127063075 |
| 10 | -6046913046 |
| 11 | 1231021544435 |
| 12 | 3962771924490 |
| 13 | -476712360617225 |
| 14 | -3580686141374166 |
| 15 | 3976143129381065225 |
| 16 | 4266519857080266570 |
| 17 | -671177298561550791575 |
| 18 | -6481738795978992136086 |
[1,-5,-6,305,330,-15125,-48726,12612265,13534410, -1127063075,-6046913046,1231021544435, 3962771924490,-476712360617225,-3580686141374166, 3976143129381065225,4266519857080266570, -671177298561550791575,-6481738795978992136086] |