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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | -1 |
| 3 | -1 |
| 4 | 3 |
| 5 | -1 |
| 6 | -7 |
| 7 | -1 |
| 8 | 15 |
| 9 | 5 |
| 10 | -9 |
| 11 | -1 |
| 12 | 13 |
| 13 | -1 |
| 14 | -11 |
| 15 | 6 |
| 16 | 47 |
| 17 | -1 |
| 18 | -22 |
| 19 | -1 |
| 20 | 19 |
| 21 | 8 |
| 22 | -15 |
| 23 | -1 |
| 24 | 69 |
| 25 | 9 |
| 26 | -17 |
| 27 | -22 |
| 28 | 25 |
| 29 | -1 |
| 30 | -38 |
| 31 | -1 |
| 32 | 127 |
| 33 | 12 |
| 34 | -21 |
| 35 | 10 |
| 36 | 58 |
| 37 | -1 |
| 38 | -23 |
| 39 | 14 |
| 40 | 99 |
| 41 | -1 |
| 42 | -48 |
| 43 | -1 |
| 44 | 37 |
| 45 | -27 |
| 46 | -27 |
| 47 | -1 |
| 48 | 213 |
| 49 | 13 |
| 50 | -44 |
| 51 | 18 |
| 52 | 43 |
| 53 | -1 |
| 54 | -130 |
| 55 | 14 |
| 56 | 129 |
| 57 | 20 |
| 58 | -33 |
| 59 | -1 |
| 60 | 98 |
| 61 | -1 |
| 62 | -35 |
| 63 | -37 |
| 64 | 319 |
| 65 | 16 |
| 66 | -68 |
[0,-1,-1,3,-1,-7,-1,15,5,-9,-1,13,-1,-11,6,47,-1, -22,-1,19,8,-15,-1,69,9,-17,-22,25,-1,-38,-1,127, 12,-21,10,58,-1,-23,14,99,-1,-48,-1,37,-27,-27,-1, 213,13,-44,18,43,-1,-130,14,129,20,-33,-1,98,-1, -35,-37,319,16,-68] |