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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 22 |
| 4 | 27 |
| 5 | 28 |
| 6 | 88 |
| 7 | 222 |
| 8 | 278 |
| 9 | 288 |
| 10 | 472 |
| 11 | 478 |
| 12 | 882 |
| 13 | 972 |
| 14 | 2788 |
| 15 | 2878 |
| 16 | 4722 |
| 17 | 4778 |
| 18 | 4788 |
| 19 | 8788 |
| 20 | 8882 |
| 21 | 28772 |
| 22 | 28788 |
| 23 | 49272 |
| 24 | 49277 |
| 25 | 49472 |
| 26 | 49722 |
| 27 | 49777 |
| 28 | 49778 |
| 29 | 49788 |
| 30 | 49827 |
| 31 | 88277 |
| 32 | 88472 |
| 33 | 88878 |
| 34 | 99722 |
| 35 | 278788 |
| 36 | 278978 |
| 37 | 279272 |
| 38 | 287972 |
| 39 | 299788 |
| 40 | 477278 |
| 41 | 478277 |
| 42 | 492222 |
| 43 | 492878 |
| 44 | 497788 |
| 45 | 499472 |
| 46 | 499478 |
| 47 | 887288 |
| 48 | 887972 |
| 49 | 888228 |
| 50 | 942222 |
| 51 | 942278 |
| 52 | 999472 |
[2,7,22,27,28,88,222,278,288,472,478,882,972,2788, 2878,4722,4778,4788,8788,8882,28772,28788,49272, 49277,49472,49722,49777,49778,49788,49827,88277, 88472,88878,99722,278788,278978,279272,287972, 299788,477278,478277,492222,492878,497788,499472, 499478,887288,887972,888228,942222,942278,999472] |