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 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 9 |
| 5 | 222 |
| 6 | 88888 |
| 7 | 666666 |
| 8 | 7777777 |
| 9 | 44444444 |
| 10 | 555555555 |
| 11 | 3333333333 |
| 12 | 777777777777 |
| 13 | 999999999999 |
| 14 | 44444444444444 |
| 15 | 222222222222222 |
| 16 | 5555555555555555 |
| 17 | 333333333333333333 |
| 18 | 8888888888888888888 |
| 19 | 666666666666666666666 |
| 20 | 9999999999999999999999 |
| 21 | 77777777777777777777777 |
| 22 | 4444444444444444444444444 |