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 | 44 |
| 4 | 888 |
| 5 | 5555 |
| 6 | 88888 |
| 7 | 1111111 |
| 8 | 2222222 |
| 9 | 22222222 |
| 10 | 77777777 |
| 11 | 1111111111 |
| 12 | 7777777777 |
| 13 | 22222222222 |
| 14 | 44444444444 |
| 15 | 444444444444 |
| 16 | 1111111111111 |
| 17 | 4444444444444 |
| 18 | 7777777777777 |
| 19 | 999999999999999 |
| 20 | 7777777777777777 |
| 21 | 22222222222222222 |
| 22 | 77777777777777777 |