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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 11 |
| 4 | 17 |
| 5 | 27 |
| 6 | 89 |
| 7 | 91 |
| 8 | 911 |
| 9 | 989 |
| 10 | 2777 |
| 11 | 2827 |
| 12 | 2877 |
| 13 | 9911 |
| 14 | 27877 |
| 15 | 28127 |
| 16 | 88189 |
| 17 | 88277 |
| 18 | 88877 |
| 19 | 98989 |
| 20 | 99891 |
| 21 | 172891 |
| 22 | 279127 |
| 23 | 282827 |
| 24 | 287891 |
| 25 | 988877 |
| 26 | 2879189 |
| 27 | 9989891 |
| 28 | 9998891 |
| 29 | 29711811 |
| 30 | 87919777 |
| 31 | 88978189 |
| 32 | 99899891 |
| 33 | 112818127 |
| 34 | 277817777 |
| 35 | 277871911 |
| 36 | 277987917 |
| 37 | 278781777 |
| 38 | 279781911 |
| 39 | 287919777 |
| 40 | 888812811 |
| 41 | 1727112877 |
| 42 | 2778718989 |
[1,9,11,17,27,89,91,911,989,2777,2827,2877,9911, 27877,28127,88189,88277,88877,98989,99891,172891, 279127,282827,287891,988877,2879189,9989891, 9998891,29711811,87919777,88978189,99899891, 112818127,277817777,277871911,277987917,278781777, 279781911,287919777,888812811,1727112877, 2778718989] |