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 | 67 |
| 2 | 67766767 |
| 3 | 76767667 |
| 4 | 6666767777 |
| 5 | 6667677677 |
| 6 | 6667776767 |
| 7 | 6667777667 |
| 8 | 6676766777 |
| 9 | 6676767677 |
| 10 | 6676776677 |
| 11 | 6677666777 |
| 12 | 6677667767 |
| 13 | 6677676767 |
| 14 | 6766677767 |
| 15 | 6766776677 |
| 16 | 6767667677 |
| 17 | 6767677667 |
| 18 | 6776766677 |
| 19 | 6776766767 |
| 20 | 6776767667 |
| 21 | 6777667667 |
| 22 | 7666677677 |
| 23 | 7666767677 |
| 24 | 7667676677 |