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 | 77767777 |
| 2 | 77777177 |
| 3 | 77777377 |
| 4 | 77777747 |
| 5 | 137777777 |
| 6 | 172777777 |
| 7 | 177677777 |
| 8 | 177776777 |
| 9 | 177777377 |
| 10 | 177777577 |
| 11 | 177777727 |
| 12 | 177777773 |
| 13 | 177777779 |
| 14 | 177797777 |
| 15 | 197777777 |
| 16 | 272777777 |
| 17 | 277177777 |
| 18 | 277727777 |
| 19 | 277771777 |
| 20 | 277775777 |
| 21 | 277777177 |