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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 2 |
| 2 | 2 |
| 3 | 3 |
| 4 | 3 |
| 5 | 5 |
| 6 | 5 |
| 7 | 7 |
| 8 | 7 |
| 9 | 7 |
| 10 | 11 |
| 11 | 11 |
| 12 | 11 |
| 13 | 13 |
| 14 | 13 |
| 15 | 13 |
| 16 | 17 |
| 17 | 17 |
| 18 | 17 |
| 19 | 19 |
| 20 | 19 |
| 21 | 19 |
| 22 | 23 |
| 23 | 23 |
| 24 | 23 |
| 25 | 23 |
| 26 | 23 |
| 27 | 29 |
| 28 | 29 |
| 29 | 29 |
| 30 | 29 |
| 31 | 31 |
| 32 | 31 |
| 33 | 31 |
| 34 | 31 |
| 35 | 37 |
| 36 | 37 |
| 37 | 37 |
| 38 | 37 |
| 39 | 37 |
| 40 | 41 |
| 41 | 41 |
| 42 | 41 |
| 43 | 43 |
| 44 | 43 |
| 45 | 43 |
| 46 | 47 |
| 47 | 47 |
| 48 | 47 |
| 49 | 47 |
| 50 | 47 |
| 51 | 53 |
| 52 | 53 |
| 53 | 53 |
| 54 | 53 |
| 55 | 53 |
| 56 | 53 |
| 57 | 59 |
| 58 | 59 |
| 59 | 59 |
| 60 | 59 |
| 61 | 61 |
| 62 | 61 |
| 63 | 61 |
| 64 | 61 |
| 65 | 67 |
| 66 | 67 |
| 67 | 67 |
| 68 | 67 |
| 69 | 67 |
| 70 | 71 |
| 71 | 71 |
[2,2,2,3,3,5,5,7,7,7,11,11,11,13,13,13,17,17,17, 19,19,19,23,23,23,23,23,29,29,29,29,31,31,31,31, 37,37,37,37,37,41,41,41,43,43,43,47,47,47,47,47, 53,53,53,53,53,53,59,59,59,59,61,61,61,61,67,67, 67,67,67,71,71] |