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 | 55 |
| 3 | 66 |
| 4 | 666 |
| 5 | 2556 |
| 6 | 5565 |
| 7 | 6555 |
| 8 | 26565 |
| 9 | 255255 |
| 10 | 2265256 |
| 11 | 5656566 |
| 12 | 55656525 |
| 13 | 525252666 |
| 14 | 2665266555 |
| 15 | 2666226566655 |
| 16 | 6655522556665 |
| 17 | 56625555222225 |
| 18 | 265556626652565 |
| 19 | 555665666566566 |
| 20 | 2626662552255225 |
| 21 | 6225222656552266 |
| 22 | 26256252552656556 |
| 23 | 652265255255252222566 |