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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -4 |
| 3 | -7 |
| 4 | -8 |
| 5 | -3 |
| 6 | 16 |
| 7 | 65 |
| 8 | 176 |
| 9 | 413 |
| 10 | 904 |
| 11 | 1905 |
| 12 | 3928 |
| 13 | 7997 |
| 14 | 16160 |
| 15 | 32513 |
| 16 | 65248 |
| 17 | 130749 |
| 18 | 261784 |
| 19 | 523889 |
| 20 | 1048136 |
| 21 | 2096669 |
| 22 | 4193776 |
| 23 | 8388033 |
| 24 | 16776592 |
| 25 | 33553757 |
| 26 | 67108136 |
| 27 | 134216945 |
| 28 | 268434616 |
| 29 | 536870013 |
| 30 | 1073740864 |
| 31 | 2147482625 |
[1,-1,-4,-7,-8,-3,16,65,176,413,904,1905,3928, 7997,16160,32513,65248,130749,261784,523889, 1048136,2096669,4193776,8388033,16776592,33553757, 67108136,134216945,268434616,536870013,1073740864, 2147482625] |