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 | 199 |
| 2 | 199777 |
| 3 | 1997773333 |
| 4 | 19977733332929292929 |
| 5 | 19977733332929292929191919191919 |
| 6 | 1997773333292929292919191919191921212121212121 |
| 7 | 1997773333292929292919191919191921212121212121121121121121121121121121 |
| 8 | 1997773333292929292919191919191921212121212121121121121121121121121121777777777 |