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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 7 |
| 3 | 9 |
| 4 | 15 |
| 5 | 21 |
| 6 | 33 |
| 7 | 45 |
| 8 | 63 |
| 9 | 75 |
| 10 | 105 |
| 11 | 153 |
| 12 | 183 |
| 13 | 195 |
| 14 | 243 |
| 15 | 273 |
| 16 | 285 |
| 17 | 435 |
| 18 | 525 |
| 19 | 573 |
| 20 | 603 |
| 21 | 813 |
| 22 | 825 |
| 23 | 1065 |
| 24 | 1233 |
| 25 | 1305 |
| 26 | 1623 |
| 27 | 2145 |
| 28 | 2595 |
| 29 | 2715 |
| 30 | 2805 |
| 31 | 3375 |
| 32 | 3465 |
| 33 | 3933 |
| 34 | 4023 |
| 35 | 4245 |
| 36 | 4275 |
| 37 | 4653 |
| 38 | 4803 |
| 39 | 4935 |
| 40 | 5655 |
| 41 | 6303 |
| 42 | 6705 |
| 43 | 7563 |
| 44 | 8865 |
| 45 | 10095 |
| 46 | 10503 |
| 47 | 10863 |
| 48 | 12165 |
| 49 | 12243 |
| 50 | 12825 |
| 51 | 13713 |
| 52 | 13725 |
| 53 | 14013 |
[4,7,9,15,21,33,45,63,75,105,153,183,195,243,273, 285,435,525,573,603,813,825,1065,1233,1305,1623, 2145,2595,2715,2805,3375,3465,3933,4023,4245,4275, 4653,4803,4935,5655,6303,6705,7563,8865,10095, 10503,10863,12165,12243,12825,13713,13725,14013] |