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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 7 |
| 3 | 10 |
| 4 | 15 |
| 5 | 21 |
| 6 | 25 |
| 7 | 39 |
| 8 | 52 |
| 9 | 87 |
| 10 | 120 |
| 11 | 129 |
| 12 | 139 |
| 13 | 189 |
| 14 | 202 |
| 15 | 259 |
| 16 | 286 |
| 17 | 316 |
| 18 | 376 |
| 19 | 391 |
| 20 | 466 |
| 21 | 472 |
| 22 | 486 |
| 23 | 510 |
| 24 | 532 |
| 25 | 574 |
| 26 | 631 |
| 27 | 642 |
| 28 | 684 |
| 29 | 685 |
| 30 | 739 |
| 31 | 750 |
| 32 | 769 |
| 33 | 882 |
| 34 | 972 |
| 35 | 987 |
| 36 | 991 |
| 37 | 1029 |
| 38 | 1074 |
| 39 | 1092 |
| 40 | 1201 |
| 41 | 1212 |
| 42 | 1231 |
| 43 | 1320 |
| 44 | 1326 |
| 45 | 1456 |
| 46 | 1506 |
| 47 | 1522 |
| 48 | 1524 |
| 49 | 1539 |
| 50 | 1575 |
| 51 | 1632 |
[4,7,10,15,21,25,39,52,87,120,129,139,189,202,259, 286,316,376,391,466,472,486,510,532,574,631,642, 684,685,739,750,769,882,972,987,991,1029,1074, 1092,1201,1212,1231,1320,1326,1456,1506,1522,1524, 1539,1575,1632] |