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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 7 |
| 3 | 0 |
| 4 | 31 |
| 5 | 0 |
| 6 | 127 |
| 7 | 0 |
| 8 | 511 |
| 9 | 64 |
| 10 | 1919 |
| 11 | 256 |
| 12 | 8191 |
| 13 | 1088 |
| 14 | 32639 |
| 15 | 4864 |
| 16 | 120319 |
| 17 | 20032 |
| 18 | 513919 |
| 19 | 107264 |
| 20 | 2039295 |
| 21 | 52800 |
| 22 | 8271743 |
| 23 | 1291008 |
| 24 | 32833023 |
| 25 | 7228992 |
| 26 | 130144127 |
| 27 | 25146112 |
| 28 | 511802879 |
| 29 | 24694336 |
| 30 | 2118080383 |
| 31 | 730018560 |
| 32 | 8329199103 |
| 33 | 772574784 |
| 34 | 31203383167 |
[1,0,7,0,31,0,127,0,511,64,1919,256,8191,1088, 32639,4864,120319,20032,513919,107264,2039295, 52800,8271743,1291008,32833023,7228992,130144127, 25146112,511802879,24694336,2118080383,730018560, 8329199103,772574784,31203383167] |