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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -4 |
| 3 | -24 |
| 4 | 832 |
| 5 | 14080 |
| 6 | -1178112 |
| 7 | -40198144 |
| 8 | 6102368256 |
| 9 | 350164353024 |
| 10 | -84145181818880 |
| 11 | -7290125908443136 |
| 12 | 2544780720155394048 |
| 13 | 310189596697035800576 |
| 14 | -148294858002251055628288 |
| 15 | -24194060487469916561080320 |
| 16 | 15177404660097357616248782848 |
| 17 | 3193403421862605489912894455808 |
| 18 | -2544493850062379218318289711136768 |
| 19 | -670888183682611536585868983069048832 |
| 20 | 661838176807194100001000065515567185920 |
[1,-4,-24,832,14080,-1178112,-40198144,6102368256, 350164353024,-84145181818880,-7290125908443136, 2544780720155394048,310189596697035800576, -148294858002251055628288, -24194060487469916561080320, 15177404660097357616248782848, 3193403421862605489912894455808, -2544493850062379218318289711136768, -670888183682611536585868983069048832, 661838176807194100001000065515567185920] |