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 | 79 |
| 2 | 97 |
| 3 | 77997979 |
| 4 | 79779979 |
| 5 | 79797997 |
| 6 | 79997977 |
| 7 | 99977797 |
| 8 | 99979777 |
| 9 | 7777997999 |
| 10 | 7779799799 |
| 11 | 7779799997 |
| 12 | 7779979979 |
| 13 | 7797799979 |
| 14 | 7797979799 |
| 15 | 7799797799 |
| 16 | 7977799799 |
| 17 | 7979799977 |
| 18 | 7979979779 |
| 19 | 7979979797 |
| 20 | 7979979977 |
| 21 | 7979997797 |
| 22 | 7997799977 |
| 23 | 7997979779 |
| 24 | 7997997977 |