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| n | a(n) |
|---|---|
| 1 | 18 |
| 2 | 81 |
| 3 | 118 |
| 4 | 189 |
| 5 | 218 |
| 6 | 281 |
| 7 | 318 |
| 8 | 381 |
| 9 | 418 |
| 10 | 481 |
| 11 | 518 |
| 12 | 581 |
| 13 | 618 |
| 14 | 681 |
| 15 | 718 |
| 16 | 781 |
| 17 | 819 |
| 18 | 881 |
| 19 | 918 |
| 20 | 981 |
| 21 | 1018 |
| 22 | 1081 |
| 23 | 1118 |
| 24 | 1189 |
| 25 | 1218 |
| 26 | 1281 |
| 27 | 1318 |
| 28 | 1381 |
| 29 | 1418 |
| 30 | 1481 |
| 31 | 1518 |
| 32 | 1581 |
| 33 | 1618 |
| 34 | 1681 |
| 35 | 1718 |
| 36 | 1781 |
| 37 | 1899 |
| 38 | 1918 |
| 39 | 1981 |
| 40 | 2018 |
| 41 | 2081 |
[18,81,118,189,218,281,318,381,418,481,518,581, 618,681,718,781,819,881,918,981,1018,1081,1118, 1189,1218,1281,1318,1381,1418,1481,1518,1581,1618, 1681,1718,1781,1899,1918,1981,2018,2081] |