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 | 6 |
| 2 | 66 |
| 3 | 666 |
| 4 | 426426 |
| 5 | 266262426 |
| 6 | 22464262666 |
| 7 | 46624464466426 |
| 8 | 644644226644644222426 |
| 9 | 46424226426466426446424262644446 |
| 10 | 626644642222466644646226466422666 |