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| n | a(n) |
|---|---|
| 1 | -1 |
| 2 | -1 |
| 3 | 3 |
| 4 | -1 |
| 5 | 13 |
| 6 | 3 |
| 7 | 3 |
| 8 | -1 |
| 9 | 57 |
| 10 | 13 |
| 11 | 35 |
| 12 | 3 |
| 13 | 21 |
| 14 | 3 |
| 15 | 3 |
| 16 | -1 |
| 17 | 241 |
| 18 | 57 |
| 19 | 7 |
| 20 | 13 |
| 21 | 13 |
| 22 | 35 |
| 23 | 39 |
| 24 | 3 |
| 25 | 169 |
| 26 | 21 |
| 27 | 5 |
| 28 | 3 |
| 29 | 21 |
| 30 | 3 |
| 31 | 3 |
| 32 | -1 |
| 33 | 993 |
| 34 | 241 |
| 35 | 11 |
| 36 | 57 |
| 37 | 7 |
| 38 | 7 |
| 39 | 5 |
| 40 | 13 |
| 41 | 3197 |
| 42 | 13 |
| 43 | 9 |
| 44 | 35 |
| 45 | 3 |
| 46 | 39 |
| 47 | 13 |
| 48 | 3 |
| 49 | 21 |
| 50 | 169 |
| 51 | 3 |
| 52 | 21 |
| 53 | 39 |
| 54 | 5 |
| 55 | 47 |
| 56 | 3 |
| 57 | 27 |
| 58 | 21 |
| 59 | 5 |
| 60 | 3 |
| 61 | 13 |
| 62 | 3 |
| 63 | 3 |
| 64 | -1 |
| 65 | 4033 |
| 66 | 993 |
| 67 | 491 |
| 68 | 241 |
[-1,-1,3,-1,13,3,3,-1,57,13,35,3,21,3,3,-1,241,57, 7,13,13,35,39,3,169,21,5,3,21,3,3,-1,993,241,11, 57,7,7,5,13,3197,13,9,35,3,39,13,3,21,169,3,21,39, 5,47,3,27,21,5,3,13,3,3,-1,4033,993,491,241] |