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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 11 |
| 11 | 22 |
| 12 | 33 |
| 13 | 44 |
| 14 | 55 |
| 15 | 66 |
| 16 | 77 |
| 17 | 88 |
| 18 | 99 |
| 19 | 1111111111111111111 |
| 20 | 2222222222222222222 |
| 21 | 3333333333333333333 |
| 22 | 4444444444444444444 |
| 23 | 5555555555555555555 |
| 24 | 6666666666666666666 |
| 25 | 7777777777777777777 |
| 26 | 8888888888888888888 |
| 27 | 9999999999999999999 |