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