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 | 1 |
| 2 | 7 |
| 3 | 11 |
| 4 | 27 |
| 5 | 77 |
| 6 | 107 |
| 7 | 111 |
| 8 | 127 |
| 9 | 177 |
| 10 | 777 |
| 11 | 1127 |
| 12 | 1177 |
| 13 | 1777 |
| 14 | 7777 |
| 15 | 11777 |
| 16 | 27777 |
| 17 | 77777 |
| 18 | 107777 |
| 19 | 111777 |
| 20 | 127777 |
| 21 | 177777 |
| 22 | 777777 |
| 23 | 1127777 |
| 24 | 1177777 |
| 25 | 1777777 |
| 26 | 7777777 |
| 27 | 11777777 |
| 28 | 27777777 |
| 29 | 77777777 |
| 30 | 107777777 |
| 31 | 111777777 |
| 32 | 127777777 |
| 33 | 177777777 |
| 34 | 777777777 |