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 | 22 |
| 3 | 333 |
| 4 | 4444 |
| 5 | 55555 |
| 6 | 666666 |
| 7 | 7777777 |
| 8 | 88888888 |
| 9 | 999999999 |
| 10 | 10101010101010101010 |
| 11 | 1111111111111111111111 |
| 12 | 121212121212121212121212 |
| 13 | 13131313131313131313131313 |
| 14 | 1414141414141414141414141414 |
| 15 | 151515151515151515151515151515 |
| 16 | 16161616161616161616161616161616 |