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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 2 |
| 6 | -1 |
| 7 | 2 |
| 8 | 2 |
| 9 | 3 |
| 10 | -1 |
| 11 | 2 |
| 12 | 2 |
| 13 | 2 |
| 14 | -1 |
| 15 | 2 |
| 16 | 4 |
| 17 | 2 |
| 18 | -1 |
| 19 | 2 |
| 20 | 2 |
| 21 | 2 |
| 22 | -1 |
| 23 | 2 |
| 24 | 2 |
| 25 | 5 |
| 26 | -1 |
| 27 | 9 |
| 28 | 2 |
| 29 | 2 |
| 30 | -1 |
| 31 | 2 |
| 32 | 8 |
| 33 | 2 |
| 34 | -1 |
| 35 | 2 |
| 36 | 6 |
| 37 | 2 |
| 38 | -1 |
| 39 | 2 |
| 40 | 2 |
| 41 | 2 |
| 42 | -1 |
| 43 | 2 |
| 44 | 2 |
| 45 | 6 |
| 46 | -1 |
| 47 | 2 |
| 48 | 4 |
| 49 | 7 |
| 50 | -1 |
| 51 | 2 |
| 52 | 2 |
| 53 | 2 |
| 54 | -1 |
| 55 | 2 |
| 56 | 2 |
| 57 | 2 |
| 58 | -1 |
| 59 | 2 |
| 60 | 2 |
| 61 | 2 |
| 62 | -1 |
| 63 | 3 |
| 64 | 16 |
| 65 | 2 |
| 66 | -1 |
| 67 | 2 |
| 68 | 2 |
| 69 | 2 |
| 70 | -1 |
| 71 | 2 |
| 72 | 6 |
| 73 | 2 |
| 74 | -1 |
| 75 | 10 |
| 76 | 2 |
| 77 | 2 |
| 78 | -1 |
| 79 | 2 |
| 80 | 4 |
| 81 | 27 |
| 82 | -1 |
| 83 | 2 |
| 84 | 2 |
| 85 | 2 |
| 86 | -1 |
| 87 | 2 |
| 88 | 2 |
| 89 | 2 |
| 90 | -1 |
[1,-1,2,2,2,-1,2,2,3,-1,2,2,2,-1,2,4,2,-1,2,2,2, -1,2,2,5,-1,9,2,2,-1,2,8,2,-1,2,6,2,-1,2,2,2,-1,2, 2,6,-1,2,4,7,-1,2,2,2,-1,2,2,2,-1,2,2,2,-1,3,16,2, -1,2,2,2,-1,2,6,2,-1,10,2,2,-1,2,4,27,-1,2,2,2,-1, 2,2,2,-1] |