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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 7 |
| 3 | 9 |
| 4 | 21 |
| 5 | 21 |
| 6 | 39 |
| 7 | 61 |
| 8 | 63 |
| 9 | 93 |
| 10 | 129 |
| 11 | 169 |
| 12 | 171 |
| 13 | 219 |
| 14 | 273 |
| 15 | 331 |
| 16 | 333 |
| 17 | 399 |
| 18 | 471 |
| 19 | 547 |
| 20 | 549 |
| 21 | 633 |
| 22 | 723 |
| 23 | 817 |
| 24 | 819 |
| 25 | 921 |
| 26 | 1029 |
| 27 | 1141 |
| 28 | 1143 |
| 29 | 1263 |
| 30 | 1389 |
| 31 | 1519 |
| 32 | 1521 |
| 33 | 1659 |
| 34 | 1803 |
| 35 | 1951 |
| 36 | 1953 |
| 37 | 2109 |
| 38 | 2271 |
| 39 | 2437 |
| 40 | 2439 |
| 41 | 2613 |
| 42 | 2793 |
| 43 | 2977 |
| 44 | 2979 |
| 45 | 3171 |
| 46 | 3369 |
| 47 | 3571 |
| 48 | 3573 |
| 49 | 3783 |
| 50 | 3999 |
| 51 | 4219 |
| 52 | 4221 |
| 53 | 4449 |
| 54 | 4683 |
| 55 | 4921 |
| 56 | 4923 |
[3,7,9,21,21,39,61,63,93,129,169,171,219,273,331, 333,399,471,547,549,633,723,817,819,921,1029,1141, 1143,1263,1389,1519,1521,1659,1803,1951,1953,2109, 2271,2437,2439,2613,2793,2977,2979,3171,3369,3571, 3573,3783,3999,4219,4221,4449,4683,4921,4923] |