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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 9 |
| 4 | 51 |
| 5 | 51 |
| 6 | 51 |
| 7 | 97 |
| 8 | 131 |
| 9 | 157 |
| 10 | 159 |
| 11 | 243 |
| 12 | 309 |
| 13 | 327 |
| 14 | 363 |
| 15 | 383 |
| 16 | 411 |
| 17 | 487 |
| 18 | 639 |
| 19 | 873 |
| 20 | 983 |
| 21 | 1231 |
| 22 | 1257 |
| 23 | 1337 |
| 24 | 1549 |
| 25 | 1589 |
| 26 | 2101 |
| 27 | 2159 |
| 28 | 2317 |
| 29 | 2871 |
| 30 | 2907 |
| 31 | 4053 |
| 32 | 4097 |
| 33 | 4597 |
| 34 | 4703 |
| 35 | 5559 |
| 36 | 5799 |
| 37 | 6337 |
| 38 | 6527 |
| 39 | 6561 |
| 40 | 6939 |
| 41 | 7147 |
| 42 | 7167 |
| 43 | 7839 |
| 44 | 8403 |
| 45 | 8873 |
| 46 | 9237 |
| 47 | 9541 |
| 48 | 9771 |
[3,7,9,51,51,51,97,131,157,159,243,309,327,363, 383,411,487,639,873,983,1231,1257,1337,1549,1589, 2101,2159,2317,2871,2907,4053,4097,4597,4703,5559, 5799,6337,6527,6561,6939,7147,7167,7839,8403,8873, 9237,9541,9771] |