This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 37 |
| 3 | 99 |
| 4 | 370 |
| 5 | 999 |
| 6 | 3367 |
| 7 | 9999 |
| 8 | 22186 |
| 9 | 99999 |
| 10 | 221860 |
| 11 | 333667 |
| 12 | 625001 |
| 13 | 625009 |
| 14 | 859415 |
| 15 | 926968 |
| 16 | 999999 |
| 17 | 1507152 |
| 18 | 3125001 |
| 19 | 3701562 |
| 20 | 7012141 |
| 21 | 9375009 |
| 22 | 9999999 |
| 23 | 20506249 |
| 24 | 28658098 |
| 25 | 33336667 |
| 26 | 46875009 |
| 27 | 78125001 |
| 28 | 79632152 |
| 29 | 86609391 |
| 30 | 98089448 |
| 31 | 99999999 |
| 32 | 306481073 |