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 | 1111 |
| 2 | 2222 |
| 3 | 3333 |
| 4 | 4444 |
| 5 | 5555 |
| 6 | 6666 |
| 7 | 7777 |
| 8 | 8888 |
| 9 | 9999 |
| 10 | 10101010 |
| 11 | 11111111 |
| 12 | 12121212 |
| 13 | 13131313 |
| 14 | 14141414 |
| 15 | 15151515 |
| 16 | 16161616 |
| 17 | 17171717 |
| 18 | 18181818 |
| 19 | 19191919 |
| 20 | 20202020 |
| 21 | 21212121 |
| 22 | 22222222 |
| 23 | 23232323 |
| 24 | 24242424 |
| 25 | 25252525 |