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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 87 |
| 3 | 957 |
| 4 | 9918 |
| 5 | 99963 |
| 6 | 888444222111 |
| 7 | 2022228505555 |
| 8 | 7707077711010111 |
| 9 | 999999924 |
| 10 | 9999999936 |
| 11 | 3333333303366666666066 |
| 12 | 999999990990666666660660 |
| 13 | 88888800088085555550005505 |
| 14 | 99999999999972 |
| 15 | 555555555055005888888888088008 |
| 16 | 66666666660660669999999999099099 |
[0,87,957,9918,99963,888444222111,2022228505555, 7707077711010111,999999924,9999999936, 3333333303366666666066,999999990990666666660660, 88888800088085555550005505,99999999999972, 555555555055005888888888088008, 66666666660660669999999999099099] |