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