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| n | a(n) |
|---|---|
| 1 | 18 |
| 2 | 118 |
| 3 | 189 |
| 4 | 218 |
| 5 | 318 |
| 6 | 418 |
| 7 | 518 |
| 8 | 618 |
| 9 | 718 |
| 10 | 818 |
| 11 | 918 |
| 12 | 1018 |
| 13 | 1118 |
| 14 | 1189 |
| 15 | 1218 |
| 16 | 1318 |
| 17 | 1418 |
| 18 | 1518 |
| 19 | 1618 |
| 20 | 1718 |
| 21 | 1899 |
| 22 | 1918 |
| 23 | 2018 |
| 24 | 2118 |
| 25 | 2189 |
| 26 | 2218 |
| 27 | 2318 |
| 28 | 2418 |
| 29 | 2518 |
| 30 | 2618 |
| 31 | 2718 |
| 32 | 2818 |
| 33 | 2918 |
| 34 | 3018 |
| 35 | 3118 |
| 36 | 3189 |
| 37 | 3218 |
| 38 | 3318 |
| 39 | 3418 |
[18,118,189,218,318,418,518,618,718,818,918,1018, 1118,1189,1218,1318,1418,1518,1618,1718,1899,1918, 2018,2118,2189,2218,2318,2418,2518,2618,2718,2818, 2918,3018,3118,3189,3218,3318,3418] |