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 | 101111 |
| 2 | 111119 |
| 3 | 111121 |
| 4 | 111191 |
| 5 | 111211 |
| 6 | 111611 |
| 7 | 112111 |
| 8 | 113111 |
| 9 | 131111 |
| 10 | 199999 |
| 11 | 311111 |
| 12 | 313333 |
| 13 | 323333 |
| 14 | 331333 |
| 15 | 333233 |
| 16 | 333323 |
| 17 | 333331 |
| 18 | 333337 |
| 19 | 333383 |
| 20 | 333433 |
| 21 | 333533 |
| 22 | 334333 |
| 23 | 343333 |
| 24 | 353333 |
| 25 | 444443 |
| 26 | 444449 |
| 27 | 511111 |
| 28 | 555557 |
| 29 | 599999 |
| 30 | 611111 |