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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 209 |
| 6 | 247 |
| 7 | 476 |
| 8 | 874 |
| 9 | 1679 |
| 10 | 4988 |
| 11 | 8959 |
| 12 | 37999 |
| 13 | 177899 |
| 14 | 99889 |
| 15 | 686999 |
| 16 | 2989889 |
| 17 | 8888999 |
| 18 | 9998998 |
| 19 | 58999999 |
| 20 | 289999997 |
| 21 | 499988899 |
| 22 | 999899998 |
| 23 | 5989989899 |
| 24 | 9989999999 |
| 25 | 99999999898 |
| 26 | 2918999999999 |
| 27 | 699999899899 |
| 28 | 1999989999989 |
| 29 | 4889999999989 |
| 30 | 8899999999898 |