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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 5 |
| 3 | -23 |
| 4 | -283 |
| 5 | 2869 |
| 6 | 49781 |
| 7 | -776887 |
| 8 | -17600759 |
| 9 | 370643273 |
| 10 | 10387420489 |
| 11 | -275311670611 |
| 12 | -9201412118867 |
| 13 | 293959006143997 |
| 14 | 11414881932150269 |
| 15 | -426781883555301359 |
| 16 | -18884637964090410991 |
| 17 | 808793517812627212561 |
| 18 | 40173648337182874339601 |
[0,5,-23,-283,2869,49781,-776887,-17600759, 370643273,10387420489,-275311670611, -9201412118867,293959006143997,11414881932150269, -426781883555301359,-18884637964090410991, 808793517812627212561,40173648337182874339601] |