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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -3 |
| 2 | 8 |
| 3 | -23 |
| 4 | 74 |
| 5 | -262 |
| 6 | 993 |
| 7 | -3943 |
| 8 | 16178 |
| 9 | -68000 |
| 10 | 291191 |
| 11 | -1265618 |
| 12 | 5568263 |
| 13 | -24749363 |
| 14 | 110961248 |
| 15 | -501209303 |
| 16 | 2278704938 |
| 17 | -10419244888 |
| 18 | 47882934663 |
| 19 | -221047167628 |
| 20 | 1024586641973 |
| 21 | -4766517165713 |
| 22 | 22248226873538 |
| 23 | -104160733650738 |
| 24 | 489007907489239 |
[1,-3,8,-23,74,-262,993,-3943,16178,-68000,291191, -1265618,5568263,-24749363,110961248,-501209303, 2278704938,-10419244888,47882934663,-221047167628, 1024586641973,-4766517165713,22248226873538, -104160733650738,489007907489239] |