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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 6 |
| 5 | 8 |
| 6 | 9 |
| 7 | 28 |
| 8 | 38 |
| 9 | 39 |
| 10 | 49 |
| 11 | 68 |
| 12 | 69 |
| 13 | 88 |
| 14 | 98 |
| 15 | 99 |
| 16 | 289 |
| 17 | 299 |
| 18 | 399 |
| 19 | 589 |
| 20 | 689 |
| 21 | 699 |
| 22 | 799 |
| 23 | 899 |
| 24 | 999 |
| 25 | 2899 |
| 26 | 3899 |
| 27 | 3999 |
| 28 | 5899 |
| 29 | 5999 |
| 30 | 6999 |
| 31 | 7999 |
| 32 | 9899 |
| 33 | 9999 |
| 34 | 19999 |
| 35 | 29999 |
| 36 | 39999 |
| 37 | 58999 |
| 38 | 68999 |
| 39 | 69999 |
| 40 | 88999 |
| 41 | 89999 |
| 42 | 99999 |
| 43 | 299899 |
| 44 | 299999 |
| 45 | 399999 |
| 46 | 499999 |
| 47 | 689999 |
[0,1,4,6,8,9,28,38,39,49,68,69,88,98,99,289,299, 399,589,689,699,799,899,999,2899,3899,3999,5899, 5999,6999,7999,9899,9999,19999,29999,39999,58999, 68999,69999,88999,89999,99999,299899,299999, 399999,499999,689999] |