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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 9 |
| 4 | 13 |
| 5 | 17 |
| 6 | 28 |
| 7 | 37 |
| 8 | 37 |
| 9 | 37 |
| 10 | 37 |
| 11 | 37 |
| 12 | 61 |
| 13 | 61 |
| 14 | 61 |
| 15 | 151 |
| 16 | 151 |
| 17 | 151 |
| 18 | 151 |
| 19 | 151 |
| 20 | 151 |
| 21 | 151 |
| 22 | 227 |
| 23 | 227 |
| 24 | 227 |
| 25 | 227 |
| 26 | 227 |
| 27 | 307 |
| 28 | 307 |
| 29 | 307 |
| 30 | 337 |
| 31 | 433 |
| 32 | 433 |
| 33 | 433 |
| 34 | 433 |
| 35 | 433 |
| 36 | 433 |
| 37 | 433 |
| 38 | 433 |
| 39 | 433 |
| 40 | 433 |
| 41 | 433 |
| 42 | 509 |
| 43 | 509 |
| 44 | 509 |
| 45 | 509 |
| 46 | 509 |
| 47 | 643 |
| 48 | 727 |
| 49 | 727 |
| 50 | 761 |
| 51 | 761 |
| 52 | 761 |
| 53 | 971 |
| 54 | 971 |
| 55 | 971 |
[2,4,9,13,17,28,37,37,37,37,37,61,61,61,151,151, 151,151,151,151,151,227,227,227,227,227,307,307, 307,337,433,433,433,433,433,433,433,433,433,433, 433,509,509,509,509,509,643,727,727,761,761,761, 971,971,971] |