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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 291 |
| 3 | 2991 |
| 4 | 29991 |
| 5 | 299991 |
| 6 | 2999991 |
| 7 | 29999991 |
| 8 | 299999991 |
| 9 | 2999999991 |
| 10 | 29999999991 |
| 11 | 299999999991 |
| 12 | 2999999999991 |
| 13 | 29999999999991 |
| 14 | 299999999999991 |
| 15 | 2999999999999991 |
| 16 | 29999999999999991 |
| 17 | 299999999999999991 |
[21,291,2991,29991,299991,2999991,29999991, 299999991,2999999991,29999999991,299999999991, 2999999999991,29999999999991,299999999999991, 2999999999999991,29999999999999991, 299999999999999991] |