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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 91 |
| 11 | 92 |
| 12 | 93 |
| 13 | 94 |
| 14 | 95 |
| 15 | 96 |
| 16 | 97 |
| 17 | 98 |
| 18 | 99 |
| 19 | 991 |
| 20 | 992 |
| 21 | 993 |
| 22 | 994 |
| 23 | 995 |
| 24 | 996 |
| 25 | 997 |
| 26 | 998 |
| 27 | 999 |
| 28 | 9991 |
| 29 | 9992 |
| 30 | 9993 |
| 31 | 9994 |
| 32 | 9995 |
| 33 | 9996 |
| 34 | 9997 |
| 35 | 9998 |
| 36 | 9999 |
| 37 | 99991 |
| 38 | 99992 |
| 39 | 99993 |
| 40 | 99994 |
| 41 | 99995 |
| 42 | 99996 |
| 43 | 99997 |
| 44 | 99998 |
| 45 | 99999 |
| 46 | 999991 |
| 47 | 999992 |
| 48 | 999993 |
| 49 | 999994 |
[1,2,3,4,5,6,7,8,9,91,92,93,94,95,96,97,98,99,991, 992,993,994,995,996,997,998,999,9991,9992,9993, 9994,9995,9996,9997,9998,9999,99991,99992,99993, 99994,99995,99996,99997,99998,99999,999991,999992, 999993,999994] |